15245542421 has 16 divisors (see below), whose sum is σ = 17017620480. Its totient is φ = 13590416640.

The previous prime is 15245542399. The next prime is 15245542423. The reversal of 15245542421 is 12424554251.

It is a cyclic number.

It is not a de Polignac number, because 15245542421 - 2¹⁸ = 15245280277 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 (15245542423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 282986 + ... + 332523.

It is an arithmetic number, because the mean of its divisors is an integer number (1063601280).

Almost surely, 2^15245542421 is an apocalyptic number.

It is an amenable number.

15245542421 is a deficient number, since it is larger than the sum of its proper divisors (1772078059).

15245542421 is a wasteful number, since it uses less digits than its factorization.

15245542421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615604.

The product of its digits is 64000, while the sum is 35.

The spelling of 15245542421 in words is "fifteen billion, two hundred forty-five million, five hundred forty-two thousand, four hundred twenty-one".