31494131 has 4 divisors (see below), whose sum is σ = 31676352. Its totient is φ = 31311912.

The previous prime is 31494119. The next prime is 31494143. The reversal of 31494131 is 13149413.

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

It is an interprime number because it is at equal distance from previous prime (31494119) and next prime (31494143).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31494131 is a prime.

It is a super-2 number, since 2×31494131² = 1983760574890322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31494131.

It is not an unprimeable number, because it can be changed into a prime (31494161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90851 + ... + 91196.

It is an arithmetic number, because the mean of its divisors is an integer number (7919088).

Almost surely, 2^31494131 is an apocalyptic number.

31494131 is a deficient number, since it is larger than the sum of its proper divisors (182221).

31494131 is a wasteful number, since it uses less digits than its factorization.

31494131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182220.

The product of its digits is 1296, while the sum is 26.

The square root of 31494131 is about 5611.9632037283. The cubic root of 31494131 is about 315.7983645299.

The spelling of 31494131 in words is "thirty-one million, four hundred ninety-four thousand, one hundred thirty-one".