131001525420 has 96 divisors (see below), whose sum is σ = 381781451520. Its totient is φ = 33522128640.

The previous prime is 131001525419. The next prime is 131001525433. The reversal of 131001525420 is 24525100131.

It is a happy number.

It is a super-2 number, since 2×131001525420² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52675 + ... + 514565.

It is an arithmetic number, because the mean of its divisors is an integer number (3976890120).

Almost surely, 2^131001525420 is an apocalyptic number.

131001525420 is a gapful number since it is divisible by the number (10) 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 131001525420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190890725760).

131001525420 is an abundant number, since it is smaller than the sum of its proper divisors (250779926100).

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

131001525420 is a wasteful number, since it uses less digits than its factorization.

131001525420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462095 (or 462093 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 131001525420 its reverse (24525100131), we get a palindrome (155526625551).

The spelling of 131001525420 in words is "one hundred thirty-one billion, one million, five hundred twenty-five thousand, four hundred twenty".