15420223231 has 8 divisors (see below), whose sum is σ = 17623941120. Its totient is φ = 13216712568.

The previous prime is 15420223211. The next prime is 15420223237. The reversal of 15420223231 is 13232202451.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15420223231 - 2⁷ = 15420223103 is a prime.

It is a super-2 number, since 2×15420223231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15420223196 and 15420223205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15420223237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172290 + ... + 246016.

It is an arithmetic number, because the mean of its divisors is an integer number (2202992640).

Almost surely, 2^15420223231 is an apocalyptic number.

15420223231 is a deficient number, since it is larger than the sum of its proper divisors (2203717889).

15420223231 is an equidigital number, since it uses as much as digits as its factorization.

15420223231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103613.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 15420223231 its reverse (13232202451), we get a palindrome (28652425682).

The spelling of 15420223231 in words is "fifteen billion, four hundred twenty million, two hundred twenty-three thousand, two hundred thirty-one".