15421000553 has 6 divisors (see below), whose sum is σ = 17938714986. Its totient is φ = 13218000432.

The previous prime is 15421000549. The next prime is 15421000579. The reversal of 15421000553 is 35500012451.

It can be written as a sum of positive squares in only one way, i.e., 9035072809 + 6385927744 = 95053^2 + 79912^2 .

It is not a de Polignac number, because 15421000553 - 2² = 15421000549 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15421000523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 157357100 + ... + 157357197.

It is an arithmetic number, because the mean of its divisors is an integer number (2989785831).

Almost surely, 2^15421000553 is an apocalyptic number.

It is an amenable number.

15421000553 is a deficient number, since it is larger than the sum of its proper divisors (2517714433).

15421000553 is an equidigital number, since it uses as much as digits as its factorization.

15421000553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314714311 (or 314714304 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The spelling of 15421000553 in words is "fifteen billion, four hundred twenty-one million, five hundred fifty-three", and thus it is an aban number.