31481794 has 4 divisors (see below), whose sum is σ = 47222694. Its totient is φ = 15740896.

The previous prime is 31481767. The next prime is 31481819. The reversal of 31481794 is 49718413.

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., 19140625 + 12341169 = 4375^2 + 3513^2 .

It is a super-2 number, since 2×31481794² = 1982206706916872, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7870447 + ... + 7870450.

Almost surely, 2^31481794 is an apocalyptic number.

31481794 is a deficient number, since it is larger than the sum of its proper divisors (15740900).

31481794 is a wasteful number, since it uses less digits than its factorization.

31481794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15740899.

The product of its digits is 24192, while the sum is 37.

The square root of 31481794 is about 5610.8639263486. The cubic root of 31481794 is about 315.7571239016.

The spelling of 31481794 in words is "thirty-one million, four hundred eighty-one thousand, seven hundred ninety-four".