57121319 has 4 divisors (see below), whose sum is σ = 57973944. Its totient is φ = 56268696.

The previous prime is 57121307. The next prime is 57121367. The reversal of 57121319 is 91312175.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 57121319 - 2¹⁶ = 57055783 is a prime.

It is a super-2 number, since 2×57121319² = 6525690168599522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 57121291 and 57121300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57121219) 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, 426212 + ... + 426345.

It is an arithmetic number, because the mean of its divisors is an integer number (14493486).

Almost surely, 2^57121319 is an apocalyptic number.

57121319 is a deficient number, since it is larger than the sum of its proper divisors (852625).

57121319 is an equidigital number, since it uses as much as digits as its factorization.

57121319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852624.

The product of its digits is 1890, while the sum is 29.

The square root of 57121319 is about 7557.8647116762. The cubic root of 57121319 is about 385.1229584212.

The spelling of 57121319 in words is "fifty-seven million, one hundred twenty-one thousand, three hundred nineteen".