51435231492 has 12 divisors (see below), whose sum is σ = 120015540176. Its totient is φ = 17145077160.

The previous prime is 51435231487. The next prime is 51435231511. The reversal of 51435231492 is 29413253415.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 51435231492.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2143134634 + ... + 2143134657.

Almost surely, 2^51435231492 is an apocalyptic number.

It is an amenable number.

51435231492 is an abundant number, since it is smaller than the sum of its proper divisors (68580308684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51435231492 is a wasteful number, since it uses less digits than its factorization.

51435231492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4286269298 (or 4286269296 counting only the distinct ones).

The product of its digits is 129600, while the sum is 39.

The spelling of 51435231492 in words is "fifty-one billion, four hundred thirty-five million, two hundred thirty-one thousand, four hundred ninety-two".