31427423 has 4 divisors (see below), whose sum is σ = 31444128. Its totient is φ = 31410720.

The previous prime is 31427419. The next prime is 31427477. The reversal of 31427423 is 32472413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32472413 = 4271 ⋅7603.

It is a cyclic number.

It is not a de Polignac number, because 31427423 - 2² = 31427419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31427392 and 31427401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31427723) 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, 5111 + ... + 9432.

It is an arithmetic number, because the mean of its divisors is an integer number (7861032).

Almost surely, 2^31427423 is an apocalyptic number.

31427423 is a deficient number, since it is larger than the sum of its proper divisors (16705).

31427423 is a wasteful number, since it uses less digits than its factorization.

31427423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16704.

The product of its digits is 4032, while the sum is 26.

The square root of 31427423 is about 5606.0166785339. The cubic root of 31427423 is about 315.5752418113.

Adding to 31427423 its reverse (32472413), we get a palindrome (63899836).

The spelling of 31427423 in words is "thirty-one million, four hundred twenty-seven thousand, four hundred twenty-three".