51155187383 has 4 divisors (see below), whose sum is σ = 51481016760. Its totient is φ = 50829358008.

The previous prime is 51155187337. The next prime is 51155187389. The reversal of 51155187383 is 38378155115.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51155187383 - 2²² = 51150993079 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 (51155187389) 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, 162914453 + ... + 162914766.

It is an arithmetic number, because the mean of its divisors is an integer number (12870254190).

Almost surely, 2^51155187383 is an apocalyptic number.

51155187383 is a deficient number, since it is larger than the sum of its proper divisors (325829377).

51155187383 is a wasteful number, since it uses less digits than its factorization.

51155187383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325829376.

The product of its digits is 504000, while the sum is 47.

The spelling of 51155187383 in words is "fifty-one billion, one hundred fifty-five million, one hundred eighty-seven thousand, three hundred eighty-three".