15255131232420 has 192 divisors, whose sum is σ = 47546841888000. Its totient is φ = 4060630379520.

The previous prime is 15255131232379. The next prime is 15255131232431. The reversal of 15255131232420 is 2423213155251.

15255131232420 is a `hidden beast` number, since 1 + 5 + 2 + 551 + 31 + 2 + 32 + 42 + 0 = 666.

It is a super-2 number, since 2×15255131232420² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2087738407 + ... + 2087745713.

It is an arithmetic number, because the mean of its divisors is an integer number (247639801500).

Almost surely, 2^{15255131232420} is an apocalyptic number.

15255131232420 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 15255131232420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23773420944000).

15255131232420 is an abundant number, since it is smaller than the sum of its proper divisors (32291710655580).

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

15255131232420 is a wasteful number, since it uses less digits than its factorization.

15255131232420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13835 (or 13827 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

Adding to 15255131232420 its reverse (2423213155251), we get a palindrome (17678344387671).

The spelling of 15255131232420 in words is "fifteen trillion, two hundred fifty-five billion, one hundred thirty-one million, two hundred thirty-two thousand, four hundred twenty".