57021623 has 8 divisors (see below), whose sum is σ = 60390528. Its totient is φ = 53726904.

The previous prime is 57021619. The next prime is 57021637. The reversal of 57021623 is 32612075.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 57021623 - 2² = 57021619 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 57021592 and 57021601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57021683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16961 + ... + 20042.

It is an arithmetic number, because the mean of its divisors is an integer number (7548816).

Almost surely, 2^57021623 is an apocalyptic number.

57021623 is a deficient number, since it is larger than the sum of its proper divisors (3368905).

57021623 is a wasteful number, since it uses less digits than its factorization.

57021623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37093.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 57021623 is about 7551.2663176450. The cubic root of 57021623 is about 384.8987713847.

Adding to 57021623 its reverse (32612075), we get a palindrome (89633698).

The spelling of 57021623 in words is "fifty-seven million, twenty-one thousand, six hundred twenty-three".