31425169 has 4 divisors (see below), whose sum is σ = 31536496. Its totient is φ = 31313844.

The previous prime is 31425133. The next prime is 31425179. The reversal of 31425169 is 96152413.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31425169 is a prime.

It is a super-2 number, since 2×31425169² = 1975082493357122, 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 31425169.

It is not an unprimeable number, because it can be changed into a prime (31425179) 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 3 ways as a sum of consecutive naturals, for example, 55239 + ... + 55804.

It is an arithmetic number, because the mean of its divisors is an integer number (7884124).

Almost surely, 2^31425169 is an apocalyptic number.

It is an amenable number.

31425169 is a deficient number, since it is larger than the sum of its proper divisors (111327).

31425169 is a wasteful number, since it uses less digits than its factorization.

31425169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111326.

The product of its digits is 6480, while the sum is 31.

The square root of 31425169 is about 5605.8156409215. The cubic root of 31425169 is about 315.5676971944.

The spelling of 31425169 in words is "thirty-one million, four hundred twenty-five thousand, one hundred sixty-nine".