51042236340 has 24 divisors (see below), whose sum is σ = 142918261920. Its totient is φ = 13611263008.

The previous prime is 51042236299. The next prime is 51042236351. The reversal of 51042236340 is 4363224015.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 51042236298 and 51042236307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 425351910 + ... + 425352029.

It is an arithmetic number, because the mean of its divisors is an integer number (5954927580).

Almost surely, 2^51042236340 is an apocalyptic number.

It is an amenable number.

51042236340 is an abundant number, since it is smaller than the sum of its proper divisors (91876025580).

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

51042236340 is a wasteful number, since it uses less digits than its factorization.

51042236340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850703951 (or 850703949 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The spelling of 51042236340 in words is "fifty-one billion, forty-two million, two hundred thirty-six thousand, three hundred forty".