51345993 has 8 divisors (see below), whose sum is σ = 69425856. Its totient is φ = 33748400.

The previous prime is 51345953. The next prime is 51346003. The reversal of 51345993 is 39954315.

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

It is a cyclic number.

It is not a de Polignac number, because 51345993 - 2¹² = 51341897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51345953) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120318 + ... + 120743.

It is an arithmetic number, because the mean of its divisors is an integer number (8678232).

Almost surely, 2^51345993 is an apocalyptic number.

It is an amenable number.

51345993 is a deficient number, since it is larger than the sum of its proper divisors (18079863).

51345993 is a wasteful number, since it uses less digits than its factorization.

51345993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241135.

The product of its digits is 72900, while the sum is 39.

The square root of 51345993 is about 7165.6118371009. The cubic root of 51345993 is about 371.6797089897.

The spelling of 51345993 in words is "fifty-one million, three hundred forty-five thousand, nine hundred ninety-three".