51021510014 has 4 divisors (see below), whose sum is σ = 76532265024. Its totient is φ = 25510755006.

The previous prime is 51021510011. The next prime is 51021510019. The reversal of 51021510014 is 41001512015.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51021510011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12755377502 + ... + 12755377505.

It is an arithmetic number, because the mean of its divisors is an integer number (19133066256).

Almost surely, 2^51021510014 is an apocalyptic number.

51021510014 is a deficient number, since it is larger than the sum of its proper divisors (25510755010).

51021510014 is a wasteful number, since it uses less digits than its factorization.

51021510014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25510755009.

The product of its (nonzero) digits is 200, while the sum is 20.

The spelling of 51021510014 in words is "fifty-one billion, twenty-one million, five hundred ten thousand, fourteen".