131561512 has 16 divisors (see below), whose sum is σ = 247334400. Its totient is φ = 65605680.

The previous prime is 131561501. The next prime is 131561513. The reversal of 131561512 is 215165131.

It is a happy number.

It is a super-2 number, since 2×131561512² = 34616862879452288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131561513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18664 + ... + 24727.

It is an arithmetic number, because the mean of its divisors is an integer number (15458400).

Almost surely, 2^131561512 is an apocalyptic number.

It is an amenable number.

131561512 is a deficient number, since it is larger than the sum of its proper divisors (115772888).

131561512 is a wasteful number, since it uses less digits than its factorization.

131561512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43776 (or 43772 counting only the distinct ones).

The product of its digits is 900, while the sum is 25.

The square root of 131561512 is about 11470.0266782602. The cubic root of 131561512 is about 508.5999174559.

The spelling of 131561512 in words is "one hundred thirty-one million, five hundred sixty-one thousand, five hundred twelve".