31121045 has 8 divisors (see below), whose sum is σ = 37411200. Its totient is φ = 24852880.

The previous prime is 31121039. The next prime is 31121059. The reversal of 31121045 is 54012113.

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

It is not a de Polignac number, because 31121045 - 2²² = 26926741 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2201 + ... + 8190.

It is an arithmetic number, because the mean of its divisors is an integer number (4676400).

Almost surely, 2^31121045 is an apocalyptic number.

It is an amenable number.

31121045 is a deficient number, since it is larger than the sum of its proper divisors (6290155).

31121045 is a wasteful number, since it uses less digits than its factorization.

31121045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10995.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 31121045 is about 5578.6239342691. The cubic root of 31121045 is about 314.5464034930.

Adding to 31121045 its reverse (54012113), we get a palindrome (85133158).

The spelling of 31121045 in words is "thirty-one million, one hundred twenty-one thousand, forty-five".