215135580 has 72 divisors (see below), whose sum is σ = 662142096. Its totient is φ = 52152320.

The previous prime is 215135573. The next prime is 215135581. The reversal of 215135580 is 85531512.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215135581) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7557 + ... + 22076.

It is an arithmetic number, because the mean of its divisors is an integer number (9196418).

Almost surely, 2^215135580 is an apocalyptic number.

215135580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215135580 is an abundant number, since it is smaller than the sum of its proper divisors (447006516).

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

215135580 is a wasteful number, since it uses less digits than its factorization.

215135580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29667 (or 29654 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 30.

The square root of 215135580 is about 14667.5008096131. The cubic root of 215135580 is about 599.1985410270.

The spelling of 215135580 in words is "two hundred fifteen million, one hundred thirty-five thousand, five hundred eighty".