31494631 has 8 divisors (see below), whose sum is σ = 36028800. Its totient is φ = 26969208.

The previous prime is 31494611. The next prime is 31494637. The reversal of 31494631 is 13649413.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31494631 - 2⁷ = 31494503 is a prime.

It is a super-2 number, since 2×31494631² = 1983823563652322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31494593 and 31494602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31494637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10320 + ... + 13018.

It is an arithmetic number, because the mean of its divisors is an integer number (4503600).

Almost surely, 2^31494631 is an apocalyptic number.

31494631 is a deficient number, since it is larger than the sum of its proper divisors (4534169).

31494631 is a wasteful number, since it uses less digits than its factorization.

31494631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4373.

The product of its digits is 7776, while the sum is 31.

The square root of 31494631 is about 5612.0077512420. The cubic root of 31494631 is about 315.8000357232.

The spelling of 31494631 in words is "thirty-one million, four hundred ninety-four thousand, six hundred thirty-one".