51345555356212 has 12 divisors (see below), whose sum is σ = 96766623556036. Its totient is φ = 23697948625920.

The previous prime is 51345555356149. The next prime is 51345555356239. The reversal of 51345555356212 is 21265355554315.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 30019594412196 + 21325960944016 = 5479014^2 + 4618004^2 .

It is a Harshad number since it is a multiple of its sum of digits (52), and also a Moran number because the ratio is a prime number: 987414526081 = 51345555356212 / (5 + 1 + 3 + 4 + 5 + 5 + 5 + 5 + 3 + 5 + 6 + 2 + 1 + 2).

It is a self number, because there is not a number n which added to its sum of digits gives 51345555356212.

It is a congruent 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, 493707262989 + ... + 493707263092.

Almost surely, 2^{51345555356212} is an apocalyptic number.

51345555356212 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

51345555356212 is a deficient number, since it is larger than the sum of its proper divisors (45421068199824).

51345555356212 is a wasteful number, since it uses less digits than its factorization.

51345555356212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987414526098 (or 987414526096 counting only the distinct ones).

The product of its digits is 13500000, while the sum is 52.

The spelling of 51345555356212 in words is "fifty-one trillion, three hundred forty-five billion, five hundred fifty-five million, three hundred fifty-six thousand, two hundred twelve".