15420131532 has 36 divisors (see below), whose sum is σ = 41977026000. Its totient is φ = 4744655712.

The previous prime is 15420131483. The next prime is 15420131599. The reversal of 15420131532 is 23513102451.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 15420131496 and 15420131505.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16474032 + ... + 16474967.

It is an arithmetic number, because the mean of its divisors is an integer number (1166028500).

Almost surely, 2^15420131532 is an apocalyptic number.

15420131532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15420131532 is an abundant number, since it is smaller than the sum of its proper divisors (26556894468).

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

15420131532 is a wasteful number, since it uses less digits than its factorization.

15420131532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32949022 (or 32949017 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 15420131532 its reverse (23513102451), we get a palindrome (38933233983).

The spelling of 15420131532 in words is "fifteen billion, four hundred twenty million, one hundred thirty-one thousand, five hundred thirty-two".