50455252421 has 18 divisors (see below), whose sum is σ = 61355689542. Its totient is φ = 41367018000.

The previous prime is 50455252417. The next prime is 50455252429. The reversal of 50455252421 is 12425255405.

It can be written as a sum of positive squares in only one way, i.e., 37388476321 + 13066776100 = 193361^2 + 114310^2 .

It is not a de Polignac number, because 50455252421 - 2² = 50455252417 is a prime.

It is a super-2 number, since 2×50455252421² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50455252429) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 947330 + ... + 999171.

It is an arithmetic number, because the mean of its divisors is an integer number (3408649419).

Almost surely, 2^50455252421 is an apocalyptic number.

It is an amenable number.

50455252421 is a deficient number, since it is larger than the sum of its proper divisors (10900437121).

50455252421 is a wasteful number, since it uses less digits than its factorization.

50455252421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1946561 (or 1946531 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 35.

The spelling of 50455252421 in words is "fifty billion, four hundred fifty-five million, two hundred fifty-two thousand, four hundred twenty-one".