213990601491 has 16 divisors (see below), whose sum is σ = 317125207200. Its totient is φ = 142614458784.

The previous prime is 213990601477. The next prime is 213990601501. The reversal of 213990601491 is 194106099312.

213990601491 is a `hidden beast` number, since 2 + 1 + 39 + 9 + 0 + 601 + 4 + 9 + 1 = 666.

It is not a de Polignac number, because 213990601491 - 2¹⁵ = 213990568723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213990651491) 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, 1190676 + ... + 1358561.

It is an arithmetic number, because the mean of its divisors is an integer number (19820325450).

Almost surely, 2^213990601491 is an apocalyptic number.

213990601491 is a deficient number, since it is larger than the sum of its proper divisors (103134605709).

213990601491 is a wasteful number, since it uses less digits than its factorization.

213990601491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2552355 (or 2552349 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The spelling of 213990601491 in words is "two hundred thirteen billion, nine hundred ninety million, six hundred one thousand, four hundred ninety-one".