213457738 has 16 divisors (see below), whose sum is σ = 352154880. Its totient is φ = 96422256.

The previous prime is 213457721. The next prime is 213457753. The reversal of 213457738 is 837754312.

It is a happy number.

213457738 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 213457738.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86118 + ... + 88561.

It is an arithmetic number, because the mean of its divisors is an integer number (22009680).

Almost surely, 2^213457738 is an apocalyptic number.

213457738 is a deficient number, since it is larger than the sum of its proper divisors (138697142).

213457738 is a wasteful number, since it uses less digits than its factorization.

213457738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174741.

The product of its digits is 141120, while the sum is 40.

The square root of 213457738 is about 14610.1929487601. The cubic root of 213457738 is about 597.6367577345.

The spelling of 213457738 in words is "two hundred thirteen million, four hundred fifty-seven thousand, seven hundred thirty-eight".