213745516 has 12 divisors (see below), whose sum is σ = 393741880. Its totient is φ = 101247840.

The previous prime is 213745513. The next prime is 213745523. The reversal of 213745516 is 615547312.

It is a super-2 number, since 2×213745516² = 91374291220212512, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (213745513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1406145 + ... + 1406296.

Almost surely, 2^213745516 is an apocalyptic number.

It is an amenable number.

213745516 is a deficient number, since it is larger than the sum of its proper divisors (179996364).

213745516 is a wasteful number, since it uses less digits than its factorization.

213745516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2812464 (or 2812462 counting only the distinct ones).

The product of its digits is 25200, while the sum is 34.

The square root of 213745516 is about 14620.0381668448. The cubic root of 213745516 is about 597.9052097492.

The spelling of 213745516 in words is "two hundred thirteen million, seven hundred forty-five thousand, five hundred sixteen".