213315550 has 48 divisors (see below), whose sum is σ = 457113600. Its totient is φ = 72545760.

The previous prime is 213315511. The next prime is 213315569. The reversal of 213315550 is 55513312.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42051 + ... + 46849.

It is an arithmetic number, because the mean of its divisors is an integer number (9523200).

Almost surely, 2^213315550 is an apocalyptic number.

213315550 is an abundant number, since it is smaller than the sum of its proper divisors (243798050).

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

213315550 is a wasteful number, since it uses less digits than its factorization.

213315550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4945 (or 4940 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 213315550 is about 14605.3260833163. The cubic root of 213315550 is about 597.5040294308.

Adding to 213315550 its reverse (55513312), we get a palindrome (268828862).

The spelling of 213315550 in words is "two hundred thirteen million, three hundred fifteen thousand, five hundred fifty".