22077457 has 2 divisors, whose sum is σ = 22077458. Its totient is φ = 22077456.

The previous prime is 22077443. The next prime is 22077469. The reversal of 22077457 is 75477022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14017536 + 8059921 = 3744^2 + 2839^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22077457 is a prime.

It is not a weakly prime, because it can be changed into another prime (22077427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11038728 + 11038729.

It is an arithmetic number, because the mean of its divisors is an integer number (11038729).

Almost surely, 2^22077457 is an apocalyptic number.

It is an amenable number.

22077457 is a deficient number, since it is larger than the sum of its proper divisors (1).

22077457 is an equidigital number, since it uses as much as digits as its factorization.

22077457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27440, while the sum is 34.

The square root of 22077457 is about 4698.6654488269. The cubic root of 22077457 is about 280.5323926779.

It can be divided in two parts, 220 and 77457, that added together give a palindrome (77677).

The spelling of 22077457 in words is "twenty-two million, seventy-seven thousand, four hundred fifty-seven".