31968154 has 4 divisors (see below), whose sum is σ = 47952234. Its totient is φ = 15984076.

The previous prime is 31968133. The next prime is 31968163. The reversal of 31968154 is 45186913.

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

It can be written as a sum of positive squares in only one way, i.e., 17413929 + 14554225 = 4173^2 + 3815^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7992037 + ... + 7992040.

Almost surely, 2^31968154 is an apocalyptic number.

31968154 is a deficient number, since it is larger than the sum of its proper divisors (15984080).

31968154 is a wasteful number, since it uses less digits than its factorization.

31968154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15984079.

The product of its digits is 25920, while the sum is 37.

The square root of 31968154 is about 5654.0387335072. The cubic root of 31968154 is about 317.3748579918.

The spelling of 31968154 in words is "thirty-one million, nine hundred sixty-eight thousand, one hundred fifty-four".