51212113235 has 4 divisors (see below), whose sum is σ = 61454535888. Its totient is φ = 40969690584.

The previous prime is 51212113223. The next prime is 51212113291. The reversal of 51212113235 is 53231121215.

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

It is a cyclic number.

It is not a de Polignac number, because 51212113235 - 2⁴ = 51212113219 is a prime.

It is a Duffinian number.

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, 5121211319 + ... + 5121211328.

It is an arithmetic number, because the mean of its divisors is an integer number (15363633972).

Almost surely, 2^51212113235 is an apocalyptic number.

51212113235 is a deficient number, since it is larger than the sum of its proper divisors (10242422653).

51212113235 is a wasteful number, since it uses less digits than its factorization.

51212113235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10242422652.

The product of its digits is 1800, while the sum is 26.

The spelling of 51212113235 in words is "fifty-one billion, two hundred twelve million, one hundred thirteen thousand, two hundred thirty-five".