213657001 has 4 divisors (see below), whose sum is σ = 216361600. Its totient is φ = 210952404.

The previous prime is 213656909. The next prime is 213657019. The reversal of 213657001 is 100756312.

213657001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213657001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213657091) 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, 1352181 + ... + 1352338.

It is an arithmetic number, because the mean of its divisors is an integer number (54090400).

Almost surely, 2^213657001 is an apocalyptic number.

It is an amenable number.

213657001 is a deficient number, since it is larger than the sum of its proper divisors (2704599).

213657001 is an equidigital number, since it uses as much as digits as its factorization.

213657001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2704598.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 213657001 is about 14617.0106725007. The cubic root of 213657001 is about 597.8226647243.

The spelling of 213657001 in words is "two hundred thirteen million, six hundred fifty-seven thousand, one".