51291855023 has 8 divisors (see below), whose sum is σ = 54731036400. Its totient is φ = 47926634688.

The previous prime is 51291855011. The next prime is 51291855037. The reversal of 51291855023 is 32055819215.

It is a happy number.

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 51291855023 - 2⁴ = 51291855007 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 (51291855323) 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, 18488828 + ... + 18491601.

It is an arithmetic number, because the mean of its divisors is an integer number (6841379550).

Almost surely, 2^51291855023 is an apocalyptic number.

51291855023 is a deficient number, since it is larger than the sum of its proper divisors (3439181377).

51291855023 is a wasteful number, since it uses less digits than its factorization.

51291855023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36980521.

The product of its (nonzero) digits is 108000, while the sum is 41.

The spelling of 51291855023 in words is "fifty-one billion, two hundred ninety-one million, eight hundred fifty-five thousand, twenty-three".