31382146 has 4 divisors (see below), whose sum is σ = 47073222. Its totient is φ = 15691072.

The previous prime is 31382123. The next prime is 31382171. The reversal of 31382146 is 64128313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64128313 = 67 ⋅957139.

It can be written as a sum of positive squares in only one way, i.e., 20748025 + 10634121 = 4555^2 + 3261^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7845535 + ... + 7845538.

Almost surely, 2^31382146 is an apocalyptic number.

31382146 is a deficient number, since it is larger than the sum of its proper divisors (15691076).

31382146 is a wasteful number, since it uses less digits than its factorization.

31382146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15691075.

The product of its digits is 3456, while the sum is 28.

The square root of 31382146 is about 5601.9769724625. The cubic root of 31382146 is about 315.4236208595.

The spelling of 31382146 in words is "thirty-one million, three hundred eighty-two thousand, one hundred forty-six".