22072457 has 6 divisors (see below), whose sum is σ = 24261594. Its totient is φ = 20065760.

The previous prime is 22072441. The next prime is 22072487. The reversal of 22072457 is 75427022.

It can be written as a sum of positive squares in only one way, i.e., 12313081 + 9759376 = 3509^2 + 3124^2 .

It is not a de Polignac number, because 22072457 - 2⁴ = 22072441 is a prime.

It is a super-3 number, since 3×22072457³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22072487) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 91088 + ... + 91329.

It is an arithmetic number, because the mean of its divisors is an integer number (4043599).

Almost surely, 2^22072457 is an apocalyptic number.

It is an amenable number.

22072457 is a deficient number, since it is larger than the sum of its proper divisors (2189137).

22072457 is a wasteful number, since it uses less digits than its factorization.

22072457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182439 (or 182428 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 29.

The square root of 22072457 is about 4698.1333527264. The cubic root of 22072457 is about 280.5112131875.

Adding to 22072457 its reverse (75427022), we get a palindrome (97499479).

It can be divided in two parts, 2207 and 2457, that added together give a palindrome (4664).

The spelling of 22072457 in words is "twenty-two million, seventy-two thousand, four hundred fifty-seven".