51540325503 has 16 divisors (see below), whose sum is σ = 70356337920. Its totient is φ = 33543123264.

The previous prime is 51540325493. The next prime is 51540325517. The reversal of 51540325503 is 30552304515.

It is a happy number.

It is not a de Polignac number, because 51540325503 - 2⁶ = 51540325439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51540325103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136075 + ... + 348707.

It is an arithmetic number, because the mean of its divisors is an integer number (4397271120).

Almost surely, 2^51540325503 is an apocalyptic number.

51540325503 is a deficient number, since it is larger than the sum of its proper divisors (18816012417).

51540325503 is a wasteful number, since it uses less digits than its factorization.

51540325503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214558.

The product of its (nonzero) digits is 45000, while the sum is 33.

The spelling of 51540325503 in words is "fifty-one billion, five hundred forty million, three hundred twenty-five thousand, five hundred three".