2191902002631 has 40 divisors (see below), whose sum is σ = 3581938800000. Its totient is φ = 1324724913360.

The previous prime is 2191902002597. The next prime is 2191902002677. The reversal of 2191902002631 is 1362002091912.

2191902002631 is a `hidden beast` number, since 2 + 1 + 9 + 19 + 0 + 2 + 0 + 0 + 2 + 631 = 666.

It is not a de Polignac number, because 2191902002631 - 2¹⁰ = 2191902001607 is a prime.

It is a super-2 number, since 2×2191902002631² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2191902002831) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3106381 + ... + 3746118.

It is an arithmetic number, because the mean of its divisors is an integer number (89548470000).

Almost surely, 2^{2191902002631} is an apocalyptic number.

2191902002631 is a deficient number, since it is larger than the sum of its proper divisors (1390036797369).

2191902002631 is a wasteful number, since it uses less digits than its factorization.

2191902002631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6852881 (or 6852872 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The spelling of 2191902002631 in words is "two trillion, one hundred ninety-one billion, nine hundred two million, two thousand, six hundred thirty-one".