131421423 has 32 divisors (see below), whose sum is σ = 211875840. Its totient is φ = 70783200.

The previous prime is 131421401. The next prime is 131421439. The reversal of 131421423 is 324124131.

It is not a de Polignac number, because 131421423 - 2²⁴ = 114644207 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 131421423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131421463) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89848 + ... + 91298.

It is an arithmetic number, because the mean of its divisors is an integer number (6621120).

Almost surely, 2^131421423 is an apocalyptic number.

131421423 is a deficient number, since it is larger than the sum of its proper divisors (80454417).

131421423 is a wasteful number, since it uses less digits than its factorization.

131421423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1707.

The product of its digits is 576, while the sum is 21.

The square root of 131421423 is about 11463.9183091995. The cubic root of 131421423 is about 508.4193313132.

Adding to 131421423 its reverse (324124131), we get a palindrome (455545554).

The spelling of 131421423 in words is "one hundred thirty-one million, four hundred twenty-one thousand, four hundred twenty-three".