31214345 has 16 divisors (see below), whose sum is σ = 39156480. Its totient is φ = 23864064.

The previous prime is 31214341. The next prime is 31214357. The reversal of 31214345 is 54341213.

It is a cyclic number.

It is not a de Polignac number, because 31214345 - 2² = 31214341 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31214345.

It is not an unprimeable number, because it can be changed into a prime (31214341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8561 + ... + 11649.

It is an arithmetic number, because the mean of its divisors is an integer number (2447280).

Almost surely, 2^31214345 is an apocalyptic number.

It is an amenable number.

31214345 is a deficient number, since it is larger than the sum of its proper divisors (7942135).

31214345 is a wasteful number, since it uses less digits than its factorization.

31214345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3184.

The product of its digits is 1440, while the sum is 23.

The square root of 31214345 is about 5586.9799534274. The cubic root of 31214345 is about 314.8604235916.

Adding to 31214345 its reverse (54341213), we get a palindrome (85555558).

The spelling of 31214345 in words is "thirty-one million, two hundred fourteen thousand, three hundred forty-five".