15431024421 has 16 divisors (see below), whose sum is σ = 22862790720. Its totient is φ = 10286443440.

The previous prime is 15431024377. The next prime is 15431024447. The reversal of 15431024421 is 12442013451.

It is not a de Polignac number, because 15431024421 - 2¹⁴ = 15431008037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15431064421) 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, 450331 + ... + 483383.

It is an arithmetic number, because the mean of its divisors is an integer number (1428924420).

Almost surely, 2^15431024421 is an apocalyptic number.

It is an amenable number.

15431024421 is a deficient number, since it is larger than the sum of its proper divisors (7431766299).

15431024421 is a wasteful number, since it uses less digits than its factorization.

15431024421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50353 (or 50347 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 15431024421 its reverse (12442013451), we get a palindrome (27873037872).

The spelling of 15431024421 in words is "fifteen billion, four hundred thirty-one million, twenty-four thousand, four hundred twenty-one".