16220457 has 24 divisors (see below), whose sum is σ = 26002080. Its totient is φ = 9660480.

The previous prime is 16220453. The next prime is 16220459. The reversal of 16220457 is 75402261.

16220457 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16220457 - 2² = 16220453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16220457.

It is not an unprimeable number, because it can be changed into a prime (16220453) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4453 + ... + 7229.

It is an arithmetic number, because the mean of its divisors is an integer number (1083420).

Almost surely, 2^16220457 is an apocalyptic number.

It is an amenable number.

16220457 is a deficient number, since it is larger than the sum of its proper divisors (9781623).

16220457 is a wasteful number, since it uses less digits than its factorization.

16220457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2853 (or 2850 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 16220457 is about 4027.4628489907. The cubic root of 16220457 is about 253.1362615932.

It can be divided in two parts, 162204 and 57, that added together give a palindrome (162261).

The spelling of 16220457 in words is "sixteen million, two hundred twenty thousand, four hundred fifty-seven".