391006400456231 has 16 divisors (see below), whose sum is σ = 450224432437248. Its totient is φ = 332637443186400.

The previous prime is 391006400456197. The next prime is 391006400456251. The reversal of 391006400456231 is 132654004600193.

It is a cyclic number.

It is not a de Polignac number, because 391006400456231 - 2²² = 391006396261927 is a prime.

It is a super-2 number, since 2×391006400456231² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391006400456251) 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, 377858780 + ... + 378892161.

It is an arithmetic number, because the mean of its divisors is an integer number (28139027027328).

Almost surely, 2^{391006400456231} is an apocalyptic number.

391006400456231 is a deficient number, since it is larger than the sum of its proper divisors (59218031981017).

391006400456231 is a wasteful number, since it uses less digits than its factorization.

391006400456231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756751502.

The product of its (nonzero) digits is 466560, while the sum is 44.

The spelling of 391006400456231 in words is "three hundred ninety-one trillion, six billion, four hundred million, four hundred fifty-six thousand, two hundred thirty-one".