51515255122 has 8 divisors (see below), whose sum is σ = 77273875836. Its totient is φ = 25757296512.

The previous prime is 51515255107. The next prime is 51515255149. The reversal of 51515255122 is 22155251515.

It can be written as a sum of positive squares in 2 ways, for example, as 51379742241 + 135512881 = 226671^2 + 11641^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147018 + ... + 353050.

Almost surely, 2^51515255122 is an apocalyptic number.

51515255122 is a deficient number, since it is larger than the sum of its proper divisors (25758620714).

51515255122 is a wasteful number, since it uses less digits than its factorization.

51515255122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331052.

The product of its digits is 25000, while the sum is 34.

The spelling of 51515255122 in words is "fifty-one billion, five hundred fifteen million, two hundred fifty-five thousand, one hundred twenty-two".