213664737 has 16 divisors (see below), whose sum is σ = 334692288. Its totient is φ = 119532480.

The previous prime is 213664697. The next prime is 213664739. The reversal of 213664737 is 737466312.

213664737 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 213664737 - 2⁷ = 213664609 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 213664695 and 213664704.

It is not an unprimeable number, because it can be changed into a prime (213664739) 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, 248598 + ... + 249455.

It is an arithmetic number, because the mean of its divisors is an integer number (20918268).

Almost surely, 2^213664737 is an apocalyptic number.

It is an amenable number.

213664737 is a deficient number, since it is larger than the sum of its proper divisors (121027551).

213664737 is a wasteful number, since it uses less digits than its factorization.

213664737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498080.

The product of its digits is 127008, while the sum is 39.

The square root of 213664737 is about 14617.2752932959. The cubic root of 213664737 is about 597.8298798718.

The spelling of 213664737 in words is "two hundred thirteen million, six hundred sixty-four thousand, seven hundred thirty-seven".