831138088474 has 4 divisors (see below), whose sum is σ = 1246707132714. Its totient is φ = 415569044236.

The previous prime is 831138088457. The next prime is 831138088507. The reversal of 831138088474 is 474880831138.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 448772709025 + 382365379449 = 669905^2 + 618357^2 .

It is a super-2 number, since 2×831138088474² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 207784522117 + ... + 207784522120.

Almost surely, 2^831138088474 is an apocalyptic number.

831138088474 is a deficient number, since it is larger than the sum of its proper divisors (415569044240).

831138088474 is a wasteful number, since it uses less digits than its factorization.

831138088474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415569044239.

The product of its (nonzero) digits is 4128768, while the sum is 55.

The spelling of 831138088474 in words is "eight hundred thirty-one billion, one hundred thirty-eight million, eighty-eight thousand, four hundred seventy-four".