213438477 has 16 divisors (see below), whose sum is σ = 327427200. Its totient is φ = 121144512.

The previous prime is 213438469. The next prime is 213438479. The reversal of 213438477 is 774834312.

It is not a de Polignac number, because 213438477 - 2³ = 213438469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213438479) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30978 + ... + 37235.

It is an arithmetic number, because the mean of its divisors is an integer number (20464200).

Almost surely, 2^213438477 is an apocalyptic number.

It is an amenable number.

213438477 is a deficient number, since it is larger than the sum of its proper divisors (113988723).

213438477 is a wasteful number, since it uses less digits than its factorization.

213438477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68372.

The product of its digits is 112896, while the sum is 39.

The square root of 213438477 is about 14609.5337707950. The cubic root of 213438477 is about 597.6187816113.

The spelling of 213438477 in words is "two hundred thirteen million, four hundred thirty-eight thousand, four hundred seventy-seven".