213715963 has 4 divisors (see below), whose sum is σ = 213865920. Its totient is φ = 213566008.

The previous prime is 213715961. The next prime is 213715969. The reversal of 213715963 is 369517312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213715963 - 2¹ = 213715961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213715961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72820 + ... + 75697.

It is an arithmetic number, because the mean of its divisors is an integer number (53466480).

Almost surely, 2^213715963 is an apocalyptic number.

213715963 is a deficient number, since it is larger than the sum of its proper divisors (149957).

213715963 is a wasteful number, since it uses less digits than its factorization.

213715963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149956.

The product of its digits is 34020, while the sum is 37.

The square root of 213715963 is about 14619.0274300310. The cubic root of 213715963 is about 597.8776525128.

The spelling of 213715963 in words is "two hundred thirteen million, seven hundred fifteen thousand, nine hundred sixty-three".