52512551421 has 32 divisors (see below), whose sum is σ = 82400934528. Its totient is φ = 29388503040.

The previous prime is 52512551393. The next prime is 52512551423. The reversal of 52512551421 is 12415521525.

It is not a de Polignac number, because 52512551421 - 2⁵ = 52512551389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52512551423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 853336 + ... + 912801.

It is an arithmetic number, because the mean of its divisors is an integer number (2575029204).

Almost surely, 2^52512551421 is an apocalyptic number.

52512551421 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

52512551421 is a deficient number, since it is larger than the sum of its proper divisors (29888383107).

52512551421 is a wasteful number, since it uses less digits than its factorization.

52512551421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1766221.

The product of its digits is 20000, while the sum is 33.

The spelling of 52512551421 in words is "fifty-two billion, five hundred twelve million, five hundred fifty-one thousand, four hundred twenty-one".