57351993 has 4 divisors (see below), whose sum is σ = 76469328. Its totient is φ = 38234660.

The previous prime is 57351991. The next prime is 57351997. The reversal of 57351993 is 39915375.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 57351993 - 2¹ = 57351991 is a prime.

It is a super-2 number, since 2×57351993² = 6578502202144098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (57351991) 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, 9558663 + ... + 9558668.

It is an arithmetic number, because the mean of its divisors is an integer number (19117332).

Almost surely, 2^57351993 is an apocalyptic number.

It is an amenable number.

57351993 is a deficient number, since it is larger than the sum of its proper divisors (19117335).

57351993 is a wasteful number, since it uses less digits than its factorization.

57351993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19117334.

The product of its digits is 127575, while the sum is 42.

The square root of 57351993 is about 7573.1098631936. The cubic root of 57351993 is about 385.6406783507.

The spelling of 57351993 in words is "fifty-seven million, three hundred fifty-one thousand, nine hundred ninety-three".