215020123500 has 192 divisors, whose sum is σ = 770632611840. Its totient is φ = 45366854400.

The previous prime is 215020123399. The next prime is 215020123523. The reversal of 215020123500 is 5321020512.

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 651120 + ... + 924119.

It is an arithmetic number, because the mean of its divisors is an integer number (4013711520).

Almost surely, 2^215020123500 is an apocalyptic number.

215020123500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215020123500 is an abundant number, since it is smaller than the sum of its proper divisors (555612488340).

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

215020123500 is a wasteful number, since it uses less digits than its factorization.

215020123500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1575281 (or 1575269 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The spelling of 215020123500 in words is "two hundred fifteen billion, twenty million, one hundred twenty-three thousand, five hundred".