131331770 has 8 divisors (see below), whose sum is σ = 236397204. Its totient is φ = 52532704.

The previous prime is 131331769. The next prime is 131331773. The reversal of 131331770 is 77133131.

It can be written as a sum of positive squares in 2 ways, for example, as 105616729 + 25715041 = 10277^2 + 5071^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×131331770² = 34496067622665800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131331773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6566579 + ... + 6566598.

Almost surely, 2^131331770 is an apocalyptic number.

131331770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131331770 is a deficient number, since it is larger than the sum of its proper divisors (105065434).

131331770 is a wasteful number, since it uses less digits than its factorization.

131331770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13133184.

The product of its (nonzero) digits is 1323, while the sum is 26.

The square root of 131331770 is about 11460.0074171006. The cubic root of 131331770 is about 508.3036939331.

The spelling of 131331770 in words is "one hundred thirty-one million, three hundred thirty-one thousand, seven hundred seventy".