15215165420 has 288 divisors, whose sum is σ = 42471475200. Its totient is φ = 4525549056.

The previous prime is 15215165411. The next prime is 15215165437. The reversal of 15215165420 is 2456151251.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 57852209 + ... + 57852471.

It is an arithmetic number, because the mean of its divisors is an integer number (147470400).

Almost surely, 2^15215165420 is an apocalyptic number.

15215165420 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 15215165420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21235737600).

15215165420 is an abundant number, since it is smaller than the sum of its proper divisors (27256309780).

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

15215165420 is a wasteful number, since it uses less digits than its factorization.

15215165420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557 (or 548 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 32.

The spelling of 15215165420 in words is "fifteen billion, two hundred fifteen million, one hundred sixty-five thousand, four hundred twenty".