631126131 has 32 divisors (see below), whose sum is σ = 886084608. Its totient is φ = 399168000.

The previous prime is 631126103. The next prime is 631126147. The reversal of 631126131 is 131621136.

It is not a de Polignac number, because 631126131 - 2¹⁰ = 631125107 is a prime.

It is a super-2 number, since 2×631126131² = 796640386462058322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (631126031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 840006 + ... + 840756.

It is an arithmetic number, because the mean of its divisors is an integer number (27690144).

Almost surely, 2^631126131 is an apocalyptic number.

631126131 is a deficient number, since it is larger than the sum of its proper divisors (254958477).

631126131 is a wasteful number, since it uses less digits than its factorization.

631126131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971.

The product of its digits is 648, while the sum is 24.

The square root of 631126131 is about 25122.2238466263. The cubic root of 631126131 is about 857.7723721170.

Adding to 631126131 its reverse (131621136), we get a palindrome (762747267).

The spelling of 631126131 in words is "six hundred thirty-one million, one hundred twenty-six thousand, one hundred thirty-one".