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131430037 = 971913523
BaseRepresentation
bin1111101010101…
…11011010010101
3100011022100010011
413311113122111
5232121230122
621013000221
73154064644
oct765273225
9304270104
10131430037
1168209372
1238023071
13212c966b
141365335b
15b812377
hex7d57695

131430037 has 4 divisors (see below), whose sum is σ = 131453280. Its totient is φ = 131406796.

The previous prime is 131430007. The next prime is 131430041. The reversal of 131430037 is 730034131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131430037 - 215 = 131397269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131430007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2958 + ... + 16480.

It is an arithmetic number, because the mean of its divisors is an integer number (32863320).

Almost surely, 2131430037 is an apocalyptic number.

It is an amenable number.

131430037 is a deficient number, since it is larger than the sum of its proper divisors (23243).

131430037 is an equidigital number, since it uses as much as digits as its factorization.

131430037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23242.

The product of its (nonzero) digits is 756, while the sum is 22.

The square root of 131430037 is about 11464.2940035573. The cubic root of 131430037 is about 508.4304391634.

Adding to 131430037 its reverse (730034131), we get a palindrome (861464168).

The spelling of 131430037 in words is "one hundred thirty-one million, four hundred thirty thousand, thirty-seven".

Divisors: 1 9719 13523 131430037