22381057 has 2 divisors, whose sum is σ = 22381058. Its totient is φ = 22381056.

The previous prime is 22381049. The next prime is 22381067. The reversal of 22381057 is 75018322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13133376 + 9247681 = 3624^2 + 3041^2 .

It is a cyclic number.

It is not a de Polignac number, because 22381057 - 2³ = 22381049 is a prime.

It is not a weakly prime, because it can be changed into another prime (22381067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11190528 + 11190529.

It is an arithmetic number, because the mean of its divisors is an integer number (11190529).

Almost surely, 2^22381057 is an apocalyptic number.

It is an amenable number.

22381057 is a deficient number, since it is larger than the sum of its proper divisors (1).

22381057 is an equidigital number, since it uses as much as digits as its factorization.

22381057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 22381057 is about 4730.8621835771. The cubic root of 22381057 is about 281.8124643844.

Adding to 22381057 its reverse (75018322), we get a palindrome (97399379).

The spelling of 22381057 in words is "twenty-two million, three hundred eighty-one thousand, fifty-seven".