15421540052 has 12 divisors (see below), whose sum is σ = 27430116756. Its totient is φ = 7584363840.

The previous prime is 15421540039. The next prime is 15421540063. The reversal of 15421540052 is 25004512451.

It can be written as a sum of positive squares in 2 ways, for example, as 4137576976 + 11283963076 = 64324^2 + 106226^2 .

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 15421539997 and 15421540024.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31601273 + ... + 31601760.

It is an arithmetic number, because the mean of its divisors is an integer number (2285843063).

Almost surely, 2^15421540052 is an apocalyptic number.

It is an amenable number.

15421540052 is a deficient number, since it is larger than the sum of its proper divisors (12008576704).

15421540052 is a wasteful number, since it uses less digits than its factorization.

15421540052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63203098 (or 63203096 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 29.

The spelling of 15421540052 in words is "fifteen billion, four hundred twenty-one million, five hundred forty thousand, fifty-two".