57148919 has 6 divisors (see below), whose sum is σ = 57553344. Its totient is φ = 56745780.

The previous prime is 57148913. The next prime is 57148921. The reversal of 57148919 is 91984175.

It is a de Polignac number, because none of the positive numbers 2^k-57148919 is a prime.

It is a super-2 number, since 2×57148919² = 6531997885737122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57148919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57148913) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 104204 + ... + 104750.

It is an arithmetic number, because the mean of its divisors is an integer number (9592224).

Almost surely, 2^57148919 is an apocalyptic number.

57148919 is a deficient number, since it is larger than the sum of its proper divisors (404425).

57148919 is an frugal number, since it uses more digits than its factorization.

57148919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285 (or 738 counting only the distinct ones).

The product of its digits is 90720, while the sum is 44.

The square root of 57148919 is about 7559.6904037136. The cubic root of 57148919 is about 385.1849766094.

The spelling of 57148919 in words is "fifty-seven million, one hundred forty-eight thousand, nine hundred nineteen".