51530533501 has 8 divisors (see below), whose sum is σ = 55591209144. Its totient is φ = 47584243200.

The previous prime is 51530533469. The next prime is 51530533511. The reversal of 51530533501 is 10533503515.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12098900025 + 39431633476 = 109995^2 + 198574^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51530533501 - 2⁵ = 51530533469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51530533511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28595400 + ... + 28597201.

It is an arithmetic number, because the mean of its divisors is an integer number (6948901143).

Almost surely, 2^51530533501 is an apocalyptic number.

It is an amenable number.

51530533501 is a deficient number, since it is larger than the sum of its proper divisors (4060675643).

51530533501 is a wasteful number, since it uses less digits than its factorization.

51530533501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57192671.

The product of its (nonzero) digits is 16875, while the sum is 31.

The spelling of 51530533501 in words is "fifty-one billion, five hundred thirty million, five hundred thirty-three thousand, five hundred one".