215100240500 has 24 divisors (see below), whose sum is σ = 469778926344. Its totient is φ = 86040096000.

The previous prime is 215100240493. The next prime is 215100240503. The reversal of 215100240500 is 5042001512.

It can be written as a sum of positive squares in 4 ways, for example, as 16150343056 + 198949897444 = 127084^2 + 446038^2 .

It is a super-2 number, since 2×215100240500² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215100240503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215099741 + ... + 215100740.

It is an arithmetic number, because the mean of its divisors is an integer number (19574121931).

Almost surely, 2^215100240500 is an apocalyptic number.

215100240500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215100240500 is an abundant number, since it is smaller than the sum of its proper divisors (254678685844).

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

215100240500 is a wasteful number, since it uses less digits than its factorization.

215100240500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430200500 (or 430200488 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The spelling of 215100240500 in words is "two hundred fifteen billion, one hundred million, two hundred forty thousand, five hundred".