51553199 has 4 divisors (see below), whose sum is σ = 52009536. Its totient is φ = 51096864.

The previous prime is 51553193. The next prime is 51553211. The reversal of 51553199 is 99135515.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99135515 = 5 ⋅19827103.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51553199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51553193) 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, 227999 + ... + 228224.

It is an arithmetic number, because the mean of its divisors is an integer number (13002384).

Almost surely, 2^51553199 is an apocalyptic number.

51553199 is a deficient number, since it is larger than the sum of its proper divisors (456337).

51553199 is a wasteful number, since it uses less digits than its factorization.

51553199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456336.

The product of its digits is 30375, while the sum is 38.

The square root of 51553199 is about 7180.0556404529. The cubic root of 51553199 is about 372.1790072879.

The spelling of 51553199 in words is "fifty-one million, five hundred fifty-three thousand, one hundred ninety-nine".