31418316 has 18 divisors (see below), whose sum is σ = 79418612. Its totient is φ = 10472760.

The previous prime is 31418311. The next prime is 31418323. The reversal of 31418316 is 61381413.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×31418316² = 1974221160551712, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31418316.

It is not an unprimeable number, because it can be changed into a prime (31418311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 436330 + ... + 436401.

Almost surely, 2^31418316 is an apocalyptic number.

31418316 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

31418316 is an abundant number, since it is smaller than the sum of its proper divisors (48000296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31418316 is a wasteful number, since it uses less digits than its factorization.

31418316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872741 (or 872736 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 31418316 is about 5605.2043673715. The cubic root of 31418316 is about 315.5447565313.

Adding to 31418316 its reverse (61381413), we get a palindrome (92799729).

The spelling of 31418316 in words is "thirty-one million, four hundred eighteen thousand, three hundred sixteen".