55973513 has 4 divisors (see below), whose sum is σ = 58407168. Its totient is φ = 53539860.

The previous prime is 55973497. The next prime is 55973521. The reversal of 55973513 is 31537955.

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 not a de Polignac number, because 55973513 - 2⁴ = 55973497 is a prime.

It is a super-2 number, since 2×55973513² = 6266068315122338, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55973543) 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, 1216793 + ... + 1216838.

It is an arithmetic number, because the mean of its divisors is an integer number (14601792).

Almost surely, 2^55973513 is an apocalyptic number.

It is an amenable number.

55973513 is a deficient number, since it is larger than the sum of its proper divisors (2433655).

55973513 is a wasteful number, since it uses less digits than its factorization.

55973513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2433654.

The product of its digits is 70875, while the sum is 38.

The square root of 55973513 is about 7481.5448271062. The cubic root of 55973513 is about 382.5259082227.

The spelling of 55973513 in words is "fifty-five million, nine hundred seventy-three thousand, five hundred thirteen".