31485418 has 4 divisors (see below), whose sum is σ = 47228130. Its totient is φ = 15742708.

The previous prime is 31485407. The next prime is 31485427. The reversal of 31485418 is 81458413.

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., 31393609 + 91809 = 5603^2 + 303^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7871353 + ... + 7871356.

Almost surely, 2^31485418 is an apocalyptic number.

31485418 is a deficient number, since it is larger than the sum of its proper divisors (15742712).

31485418 is a wasteful number, since it uses less digits than its factorization.

31485418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15742711.

The product of its digits is 15360, while the sum is 34.

The square root of 31485418 is about 5611.1868619749. The cubic root of 31485418 is about 315.7692394745.

The spelling of 31485418 in words is "thirty-one million, four hundred eighty-five thousand, four hundred eighteen".