31214919 has 8 divisors (see below), whose sum is σ = 41726320. Its totient is φ = 20756736.

The previous prime is 31214903. The next prime is 31214921. The reversal of 31214919 is 91941213.

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

It is not a de Polignac number, because 31214919 - 2⁴ = 31214903 is a prime.

It is a super-2 number, since 2×31214919² = 1948742336353122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31214969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11914 + ... + 14295.

It is an arithmetic number, because the mean of its divisors is an integer number (5215790).

Almost surely, 2^31214919 is an apocalyptic number.

31214919 is a deficient number, since it is larger than the sum of its proper divisors (10511401).

31214919 is a wasteful number, since it uses less digits than its factorization.

31214919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26609.

The product of its digits is 1944, while the sum is 30.

The square root of 31214919 is about 5587.0313226256. The cubic root of 31214919 is about 314.8623535672.

The spelling of 31214919 in words is "thirty-one million, two hundred fourteen thousand, nine hundred nineteen".