22057531 has 2 divisors, whose sum is σ = 22057532. Its totient is φ = 22057530.

The previous prime is 22057507. The next prime is 22057543. The reversal of 22057531 is 13575022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22057531 - 2⁷ = 22057403 is a prime.

It is a super-2 number, since 2×22057531² = 973069347631922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22057496 and 22057505.

It is not a weakly prime, because it can be changed into another prime (22057561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11028765 + 11028766.

It is an arithmetic number, because the mean of its divisors is an integer number (11028766).

Almost surely, 2^22057531 is an apocalyptic number.

22057531 is a deficient number, since it is larger than the sum of its proper divisors (1).

22057531 is an equidigital number, since it uses as much as digits as its factorization.

22057531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 22057531 is about 4696.5445808594. The cubic root of 22057531 is about 280.4479691410.

The spelling of 22057531 in words is "twenty-two million, fifty-seven thousand, five hundred thirty-one".