57220402 has 16 divisors (see below), whose sum is σ = 91183320. Its totient is φ = 26837248.

The previous prime is 57220399. The next prime is 57220403. The reversal of 57220402 is 20402275.

57220402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 23126481 + 34093921 = 4809^2 + 5839^2 .

It is not an unprimeable number, because it can be changed into a prime (57220403) 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, 8124 + ... + 13432.

Almost surely, 2^57220402 is an apocalyptic number.

57220402 is a deficient number, since it is larger than the sum of its proper divisors (33962918).

57220402 is a wasteful number, since it uses less digits than its factorization.

57220402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5645.

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 57220402 is about 7564.4168314550. The cubic root of 57220402 is about 385.3455086955.

Adding to 57220402 its reverse (20402275), we get a palindrome (77622677).

The spelling of 57220402 in words is "fifty-seven million, two hundred twenty thousand, four hundred two".