57211623 has 32 divisors (see below), whose sum is σ = 97310720. Its totient is φ = 32542560.

The previous prime is 57211621. The next prime is 57211631. The reversal of 57211623 is 32611275.

It is a happy number.

It is not a de Polignac number, because 57211623 - 2¹ = 57211621 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57211621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50661 + ... + 51777.

It is an arithmetic number, because the mean of its divisors is an integer number (3040960).

Almost surely, 2^57211623 is an apocalyptic number.

57211623 is a deficient number, since it is larger than the sum of its proper divisors (40099097).

57211623 is a wasteful number, since it uses less digits than its factorization.

57211623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1404 (or 1398 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 57211623 is about 7563.8365265254. The cubic root of 57211623 is about 385.3258005662.

Adding to 57211623 its reverse (32611275), we get a palindrome (89822898).

The spelling of 57211623 in words is "fifty-seven million, two hundred eleven thousand, six hundred twenty-three".