51231440235 has 32 divisors (see below), whose sum is σ = 82276439040. Its totient is φ = 27221545728.

The previous prime is 51231440233. The next prime is 51231440263. The reversal of 51231440235 is 53204413215.

It is not a de Polignac number, because 51231440235 - 2¹ = 51231440233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51231440233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6211024 + ... + 6219266.

It is an arithmetic number, because the mean of its divisors is an integer number (2571138720).

Almost surely, 2^51231440235 is an apocalyptic number.

51231440235 is a deficient number, since it is larger than the sum of its proper divisors (31044998805).

51231440235 is a wasteful number, since it uses less digits than its factorization.

51231440235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9747.

The product of its (nonzero) digits is 14400, while the sum is 30.

The spelling of 51231440235 in words is "fifty-one billion, two hundred thirty-one million, four hundred forty thousand, two hundred thirty-five".