213557442 has 32 divisors (see below), whose sum is σ = 488564352. Its totient is φ = 60962304.

The previous prime is 213557437. The next prime is 213557467. The reversal of 213557442 is 244755312.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92818 + ... + 95090.

It is an arithmetic number, because the mean of its divisors is an integer number (15267636).

Almost surely, 2^213557442 is an apocalyptic number.

213557442 is an abundant number, since it is smaller than the sum of its proper divisors (275006910).

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

213557442 is a wasteful number, since it uses less digits than its factorization.

213557442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4522.

The product of its digits is 33600, while the sum is 33.

The square root of 213557442 is about 14613.6046887823. The cubic root of 213557442 is about 597.7297933252.

The spelling of 213557442 in words is "two hundred thirteen million, five hundred fifty-seven thousand, four hundred forty-two".