131023536 has 80 divisors (see below), whose sum is σ = 396307968. Its totient is φ = 36518400.

The previous prime is 131023523. The next prime is 131023553. The reversal of 131023536 is 635320131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9021 + ... + 18531.

Almost surely, 2^131023536 is an apocalyptic number.

131023536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131023536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198153984).

131023536 is an abundant number, since it is smaller than the sum of its proper divisors (265284432).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131023536 is a wasteful number, since it uses less digits than its factorization.

131023536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9570 (or 9564 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 24.

The square root of 131023536 is about 11446.5512710161. The cubic root of 131023536 is about 507.9057216490.

Adding to 131023536 its reverse (635320131), we get a palindrome (766343667).

The spelling of 131023536 in words is "one hundred thirty-one million, twenty-three thousand, five hundred thirty-six".