31222057 has 8 divisors (see below), whose sum is σ = 31829312. Its totient is φ = 30618000.

The previous prime is 31222021. The next prime is 31222091. The reversal of 31222057 is 75022213.

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

It is a cyclic number.

It is not a de Polignac number, because 31222057 - 2¹⁹ = 30697769 is a prime.

It is a super-2 number, since 2×31222057² = 1949633686622498, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31222157) 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 7 ways as a sum of consecutive naturals, for example, 29182 + ... + 30232.

It is an arithmetic number, because the mean of its divisors is an integer number (3978664).

Almost surely, 2^31222057 is an apocalyptic number.

It is an amenable number.

31222057 is a deficient number, since it is larger than the sum of its proper divisors (607255).

31222057 is a wasteful number, since it uses less digits than its factorization.

31222057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1599.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 31222057 is about 5587.6700868967. The cubic root of 31222057 is about 314.8863518802.

The spelling of 31222057 in words is "thirty-one million, two hundred twenty-two thousand, fifty-seven".