1423515231 has 6 divisors (see below), whose sum is σ = 2056188680. Its totient is φ = 949010148.

The previous prime is 1423515229. The next prime is 1423515239. The reversal of 1423515231 is 1325153241.

1423515231 is a `hidden beast` number, since 1 + 423 + 5 + 1 + 5 + 231 = 666.

It is not a de Polignac number, because 1423515231 - 2¹ = 1423515229 is a prime.

It is a super-2 number, since 2×1423515231² = 4052791225777966722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1423515195 and 1423515204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1423515239) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 79084171 + ... + 79084188.

Almost surely, 2^1423515231 is an apocalyptic number.

1423515231 is a deficient number, since it is larger than the sum of its proper divisors (632673449).

1423515231 is a wasteful number, since it uses less digits than its factorization.

1423515231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158168365 (or 158168362 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 1423515231 is about 37729.5008050729. The cubic root of 1423515231 is about 1124.9175856664.

Adding to 1423515231 its reverse (1325153241), we get a palindrome (2748668472).

The spelling of 1423515231 in words is "one billion, four hundred twenty-three million, five hundred fifteen thousand, two hundred thirty-one".