23005557 has 12 divisors (see below), whose sum is σ = 33525804. Its totient is φ = 15200640.

The previous prime is 23005547. The next prime is 23005571. The reversal of 23005557 is 75550032.

It can be written as a sum of positive squares in 2 ways, for example, as 11350161 + 11655396 = 3369^2 + 3414^2 .

It is not a de Polignac number, because 23005557 - 2⁷ = 23005429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23005557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23005517) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10294 + ... + 12327.

It is an arithmetic number, because the mean of its divisors is an integer number (2793817).

Almost surely, 2^23005557 is an apocalyptic number.

It is an amenable number.

23005557 is a deficient number, since it is larger than the sum of its proper divisors (10520247).

23005557 is a wasteful number, since it uses less digits than its factorization.

23005557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22740 (or 22737 counting only the distinct ones).

The product of its (nonzero) digits is 5250, while the sum is 27.

The square root of 23005557 is about 4796.4108456220. The cubic root of 23005557 is about 284.4095995739.

Adding to 23005557 its reverse (75550032), we get a palindrome (98555589).

The spelling of 23005557 in words is "twenty-three million, five thousand, five hundred fifty-seven".