51450239102 has 4 divisors (see below), whose sum is σ = 77175358656. Its totient is φ = 25725119550.

The previous prime is 51450239089. The next prime is 51450239129. The reversal of 51450239102 is 20193205415.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12862559774 + ... + 12862559777.

It is an arithmetic number, because the mean of its divisors is an integer number (19293839664).

Almost surely, 2^51450239102 is an apocalyptic number.

51450239102 is a deficient number, since it is larger than the sum of its proper divisors (25725119554).

51450239102 is a wasteful number, since it uses less digits than its factorization.

51450239102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25725119553.

The product of its (nonzero) digits is 10800, while the sum is 32.

The spelling of 51450239102 in words is "fifty-one billion, four hundred fifty million, two hundred thirty-nine thousand, one hundred two".