213500394 has 32 divisors (see below), whose sum is σ = 478082880. Its totient is φ = 70621200.

The previous prime is 213500393. The next prime is 213500411. The reversal of 213500394 is 493005312.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (213500393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8017 + ... + 22164.

It is an arithmetic number, because the mean of its divisors is an integer number (14940090).

Almost surely, 2^213500394 is an apocalyptic number.

213500394 is an abundant number, since it is smaller than the sum of its proper divisors (264582486).

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

213500394 is a wasteful number, since it uses less digits than its factorization.

213500394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30323 (or 30317 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 213500394 is about 14611.6526785987. The cubic root of 213500394 is about 597.6765643583.

The spelling of 213500394 in words is "two hundred thirteen million, five hundred thousand, three hundred ninety-four".