31454138 has 4 divisors (see below), whose sum is σ = 47181210. Its totient is φ = 15727068.

The previous prime is 31454123. The next prime is 31454147. The reversal of 31454138 is 83145413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83145413 = 13 ⋅6395801.

It can be written as a sum of positive squares in only one way, i.e., 24039409 + 7414729 = 4903^2 + 2723^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31454138.

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 as a sum of consecutive naturals, namely, 7863533 + ... + 7863536.

Almost surely, 2^31454138 is an apocalyptic number.

31454138 is a deficient number, since it is larger than the sum of its proper divisors (15727072).

31454138 is a wasteful number, since it uses less digits than its factorization.

31454138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15727071.

The product of its digits is 5760, while the sum is 29.

The square root of 31454138 is about 5608.3988802509. The cubic root of 31454138 is about 315.6646351297.

The spelling of 31454138 in words is "thirty-one million, four hundred fifty-four thousand, one hundred thirty-eight".