131630551 has 6 divisors (see below), whose sum is σ = 142535040. Its totient is φ = 121504968.

The previous prime is 131630533. The next prime is 131630563. The reversal of 131630551 is 155036131.

It is not a de Polignac number, because 131630551 - 2¹⁷ = 131499479 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 (131630501) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 389271 + ... + 389608.

It is an arithmetic number, because the mean of its divisors is an integer number (23755840).

Almost surely, 2^131630551 is an apocalyptic number.

131630551 is a deficient number, since it is larger than the sum of its proper divisors (10904489).

131630551 is an equidigital number, since it uses as much as digits as its factorization.

131630551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778905 (or 778892 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 131630551 is about 11473.0358231812. The cubic root of 131630551 is about 508.6888672024.

Adding to 131630551 its reverse (155036131), we get a palindrome (286666682).

The spelling of 131630551 in words is "one hundred thirty-one million, six hundred thirty thousand, five hundred fifty-one".