57211390 has 8 divisors (see below), whose sum is σ = 102980520. Its totient is φ = 22884552.

The previous prime is 57211387. The next prime is 57211393. The reversal of 57211390 is 9311275.

It is an interprime number because it is at equal distance from previous prime (57211387) and next prime (57211393).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57211393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2860560 + ... + 2860579.

It is an arithmetic number, because the mean of its divisors is an integer number (12872565).

Almost surely, 2^57211390 is an apocalyptic number.

57211390 is a deficient number, since it is larger than the sum of its proper divisors (45769130).

57211390 is a wasteful number, since it uses less digits than its factorization.

57211390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5721146.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 57211390 is about 7563.8211242731. The cubic root of 57211390 is about 385.3252774730.

The spelling of 57211390 in words is "fifty-seven million, two hundred eleven thousand, three hundred ninety".