1423520131 has 4 divisors (see below), whose sum is σ = 1552931064. Its totient is φ = 1294109200.

The previous prime is 1423520113. The next prime is 1423520149. The reversal of 1423520131 is 1310253241.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1423520113) and next prime (1423520149).

It is a cyclic number.

It is not a de Polignac number, because 1423520131 - 2⁹ = 1423519619 is a prime.

It is a super-2 number, since 2×1423520131² = 4052819126724514322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1423520171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64705450 + ... + 64705471.

It is an arithmetic number, because the mean of its divisors is an integer number (388232766).

Almost surely, 2^1423520131 is an apocalyptic number.

1423520131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1423520131 is a deficient number, since it is larger than the sum of its proper divisors (129410933).

1423520131 is a wasteful number, since it uses less digits than its factorization.

1423520131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129410932.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1423520131 is about 37729.5657409411. The cubic root of 1423520131 is about 1124.9188763890.

Adding to 1423520131 its reverse (1310253241), we get a palindrome (2733773372).

The spelling of 1423520131 in words is "one billion, four hundred twenty-three million, five hundred twenty thousand, one hundred thirty-one".