131525810 has 16 divisors (see below), whose sum is σ = 254957976. Its totient is φ = 48563328.

The previous prime is 131525783. The next prime is 131525813. The reversal of 131525810 is 18525131.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 117961321 + 13564489 = 10861^2 + 3683^2 .

It is a super-2 number, since 2×131525810² = 34598077392312200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 131525810.

It is not an unprimeable number, because it can be changed into a prime (131525813) 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 7 ways as a sum of consecutive naturals, for example, 505739 + ... + 505998.

Almost surely, 2^131525810 is an apocalyptic number.

131525810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131525810 is a deficient number, since it is larger than the sum of its proper divisors (123432166).

131525810 is a wasteful number, since it uses less digits than its factorization.

131525810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011757.

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 131525810 is about 11468.4702554438. The cubic root of 131525810 is about 508.5539068440.

The spelling of 131525810 in words is "one hundred thirty-one million, five hundred twenty-five thousand, eight hundred ten".