213951137 has 8 divisors (see below), whose sum is σ = 226676736. Its totient is φ = 201241152.

The previous prime is 213951121. The next prime is 213951139. The reversal of 213951137 is 731159312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213951137 - 2⁴ = 213951121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213951139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36128 + ... + 41630.

It is an arithmetic number, because the mean of its divisors is an integer number (28334592).

Almost surely, 2^213951137 is an apocalyptic number.

It is an amenable number.

213951137 is a deficient number, since it is larger than the sum of its proper divisors (12725599).

213951137 is a wasteful number, since it uses less digits than its factorization.

213951137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7807.

The product of its digits is 5670, while the sum is 32.

The square root of 213951137 is about 14627.0686400249. The cubic root of 213951137 is about 598.0968745344.

The spelling of 213951137 in words is "two hundred thirteen million, nine hundred fifty-one thousand, one hundred thirty-seven".