22402557 has 12 divisors (see below), whose sum is σ = 32559904. Its totient is φ = 14842440.

The previous prime is 22402547. The next prime is 22402561. The reversal of 22402557 is 75520422.

It is not a de Polignac number, because 22402557 - 2⁸ = 22402301 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22402557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22402537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6169 + ... + 9102.

Almost surely, 2^22402557 is an apocalyptic number.

It is an amenable number.

22402557 is a deficient number, since it is larger than the sum of its proper divisors (10157347).

22402557 is a wasteful number, since it uses less digits than its factorization.

22402557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15440 (or 15437 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 22402557 is about 4733.1339511998. The cubic root of 22402557 is about 281.9026750309.

Adding to 22402557 its reverse (75520422), we get a palindrome (97922979).

The spelling of 22402557 in words is "twenty-two million, four hundred two thousand, five hundred fifty-seven".