213550331 has 8 divisors (see below), whose sum is σ = 225889440. Its totient is φ = 201465792.

The previous prime is 213550319. The next prime is 213550339. The reversal of 213550331 is 133055312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213550331 - 2¹⁰ = 213549307 is a prime.

It is a super-2 number, since 2×213550331² = 91207487740419122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 213550297 and 213550306.

It is not an unprimeable number, because it can be changed into a prime (213550339) 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, 61916 + ... + 65273.

It is an arithmetic number, because the mean of its divisors is an integer number (28236180).

Almost surely, 2^213550331 is an apocalyptic number.

213550331 is a deficient number, since it is larger than the sum of its proper divisors (12339109).

213550331 is a wasteful number, since it uses less digits than its factorization.

213550331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127285.

The product of its (nonzero) digits is 1350, while the sum is 23.

The square root of 213550331 is about 14613.3613860740. The cubic root of 213550331 is about 597.7231588827.

The spelling of 213550331 in words is "two hundred thirteen million, five hundred fifty thousand, three hundred thirty-one".