31434123 has 32 divisors (see below), whose sum is σ = 50429952. Its totient is φ = 17028000.

The previous prime is 31434107. The next prime is 31434149. The reversal of 31434123 is 32143413.

It is not a de Polignac number, because 31434123 - 2⁴ = 31434107 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 31434123.

It is not an unprimeable number, because it can be changed into a prime (31434163) 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, 72718 + ... + 73148.

It is an arithmetic number, because the mean of its divisors is an integer number (1575936).

Almost surely, 2^31434123 is an apocalyptic number.

31434123 is a deficient number, since it is larger than the sum of its proper divisors (18995829).

31434123 is a wasteful number, since it uses less digits than its factorization.

31434123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615.

The product of its digits is 864, while the sum is 21.

The square root of 31434123 is about 5606.6142189382. The cubic root of 31434123 is about 315.5976660053.

Adding to 31434123 its reverse (32143413), we get a palindrome (63577536).

The spelling of 31434123 in words is "thirty-one million, four hundred thirty-four thousand, one hundred twenty-three".