15423431 has 2 divisors, whose sum is σ = 15423432. Its totient is φ = 15423430.

The previous prime is 15423427. The next prime is 15423439. The reversal of 15423431 is 13432451.

It is a weak prime.

It is an emirp because it is prime and its reverse (13432451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15423431 - 2² = 15423427 is a prime.

It is a super-2 number, since 2×15423431² = 475764447623522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 15423397 and 15423406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15423439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7711715 + 7711716.

It is an arithmetic number, because the mean of its divisors is an integer number (7711716).

Almost surely, 2^15423431 is an apocalyptic number.

15423431 is a deficient number, since it is larger than the sum of its proper divisors (1).

15423431 is an equidigital number, since it uses as much as digits as its factorization.

15423431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 23.

The square root of 15423431 is about 3927.2676252071. The cubic root of 15423431 is about 248.9203091164.

Adding to 15423431 its reverse (13432451), we get a palindrome (28855882).

The spelling of 15423431 in words is "fifteen million, four hundred twenty-three thousand, four hundred thirty-one".