57623281 has 3 divisors (see below), whose sum is σ = 57630873. Its totient is φ = 57615690.

The previous prime is 57623273. The next prime is 57623287. The reversal of 57623281 is 18232675.

It is a happy number.

The square root of 57623281 is 7591.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 57623281 - 2³ = 57623273 is a prime.

It is a super-2 number, since 2×57623281² = 6640885026409922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57623287) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3796 + ... + 11386.

It is an arithmetic number, because the mean of its divisors is an integer number (19210291).

Almost surely, 2^57623281 is an apocalyptic number.

57623281 is the 7591-st square number.

57623281 is the 3796-th centered octagonal number.

It is an amenable number.

57623281 is a deficient number, since it is larger than the sum of its proper divisors (7592).

57623281 is an frugal number, since it uses more digits than its factorization.

57623281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15182 (or 7591 counting only the distinct ones).

The product of its digits is 20160, while the sum is 34.

The cubic root of 57623281 is about 386.2477782188.

The spelling of 57623281 in words is "fifty-seven million, six hundred twenty-three thousand, two hundred eighty-one".