213031442 has 32 divisors (see below), whose sum is σ = 358525440. Its totient is φ = 94268160.

The previous prime is 213031421. The next prime is 213031457. The reversal of 213031442 is 244130312.

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, 89909 + ... + 92247.

It is an arithmetic number, because the mean of its divisors is an integer number (11203920).

Almost surely, 2^213031442 is an apocalyptic number.

213031442 is a deficient number, since it is larger than the sum of its proper divisors (145493998).

213031442 is a wasteful number, since it uses less digits than its factorization.

213031442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2498.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 213031442 is about 14595.5966647479. The cubic root of 213031442 is about 597.2386462232.

Adding to 213031442 its reverse (244130312), we get a palindrome (457161754).

The spelling of 213031442 in words is "two hundred thirteen million, thirty-one thousand, four hundred forty-two".