213924492 has 18 divisors (see below), whose sum is σ = 540753668. Its totient is φ = 71308152.

The previous prime is 213924461. The next prime is 213924517. The reversal of 213924492 is 294429312.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 5942347 = 213924492 / (2 + 1 + 3 + 9 + 2 + 4 + 4 + 9 + 2).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2971138 + ... + 2971209.

Almost surely, 2^213924492 is an apocalyptic number.

It is an amenable number.

213924492 is an abundant number, since it is smaller than the sum of its proper divisors (326829176).

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

213924492 is a wasteful number, since it uses less digits than its factorization.

213924492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5942357 (or 5942352 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 213924492 is about 14626.1578003247. The cubic root of 213924492 is about 598.0720449509.

The spelling of 213924492 in words is "two hundred thirteen million, nine hundred twenty-four thousand, four hundred ninety-two".