31423135 has 4 divisors (see below), whose sum is σ = 37707768. Its totient is φ = 25138504.

The previous prime is 31423127. The next prime is 31423159. The reversal of 31423135 is 53132413.

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

It is a cyclic number.

It is not a de Polignac number, because 31423135 - 2³ = 31423127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3142309 + ... + 3142318.

It is an arithmetic number, because the mean of its divisors is an integer number (9426942).

Almost surely, 2^31423135 is an apocalyptic number.

31423135 is a deficient number, since it is larger than the sum of its proper divisors (6284633).

31423135 is an equidigital number, since it uses as much as digits as its factorization.

31423135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6284632.

The product of its digits is 1080, while the sum is 22.

The square root of 31423135 is about 5605.6342192476. The cubic root of 31423135 is about 315.5608886546.

Adding to 31423135 its reverse (53132413), we get a palindrome (84555548).

The spelling of 31423135 in words is "thirty-one million, four hundred twenty-three thousand, one hundred thirty-five".