51677352021 has 8 divisors (see below), whose sum is σ = 68950759744. Its totient is φ = 34427756160.

The previous prime is 51677352019. The next prime is 51677352031. The reversal of 51677352021 is 12025377615.

It is a happy number.

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

It is not a de Polignac number, because 51677352021 - 2¹ = 51677352019 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 (51677352031) 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, 5947900 + ... + 5956581.

It is an arithmetic number, because the mean of its divisors is an integer number (8618844968).

Almost surely, 2^51677352021 is an apocalyptic number.

It is an amenable number.

51677352021 is a deficient number, since it is larger than the sum of its proper divisors (17273407723).

51677352021 is a wasteful number, since it uses less digits than its factorization.

51677352021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11905931.

The product of its (nonzero) digits is 88200, while the sum is 39.

The spelling of 51677352021 in words is "fifty-one billion, six hundred seventy-seven million, three hundred fifty-two thousand, twenty-one".