31222045 has 8 divisors (see below), whose sum is σ = 37610496. Its totient is φ = 24881616.

The previous prime is 31222021. The next prime is 31222091. The reversal of 31222045 is 54022213.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31222045 is a prime.

It is a Duffinian number.

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, 10557 + ... + 13186.

It is an arithmetic number, because the mean of its divisors is an integer number (4701312).

Almost surely, 2^31222045 is an apocalyptic number.

It is an amenable number.

31222045 is a deficient number, since it is larger than the sum of its proper divisors (6388451).

31222045 is a wasteful number, since it uses less digits than its factorization.

31222045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24011.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 31222045 is about 5587.6690131038. The cubic root of 31222045 is about 314.8863115387.

Adding to 31222045 its reverse (54022213), we get a palindrome (85244258).

The spelling of 31222045 in words is "thirty-one million, two hundred twenty-two thousand, forty-five".