31418481 has 4 divisors (see below), whose sum is σ = 41891312. Its totient is φ = 20945652.

The previous prime is 31418479. The next prime is 31418489. The reversal of 31418481 is 18481413.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 31418481 - 2¹ = 31418479 is a prime.

It is a super-2 number, since 2×31418481² = 1974241896694722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31418489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5236411 + ... + 5236416.

It is an arithmetic number, because the mean of its divisors is an integer number (10472828).

Almost surely, 2^31418481 is an apocalyptic number.

It is an amenable number.

31418481 is a deficient number, since it is larger than the sum of its proper divisors (10472831).

31418481 is a wasteful number, since it uses less digits than its factorization.

31418481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10472830.

The product of its digits is 3072, while the sum is 30.

The square root of 31418481 is about 5605.2190858164. The cubic root of 31418481 is about 315.5453089139.

Adding to 31418481 its reverse (18481413), we get a palindrome (49899894).

The spelling of 31418481 in words is "thirty-one million, four hundred eighteen thousand, four hundred eighty-one".