31413081 has 8 divisors (see below), whose sum is σ = 47867584. Its totient is φ = 17950320.

The previous prime is 31413077. The next prime is 31413089. The reversal of 31413081 is 18031413.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31413081 - 2² = 31413077 is a prime.

It is a super-2 number, since 2×31413081² = 1973563315825122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 1495861 = 31413081 / (3 + 1 + 4 + 1 + 3 + 0 + 8 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31413089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 747910 + ... + 747951.

It is an arithmetic number, because the mean of its divisors is an integer number (5983448).

Almost surely, 2^31413081 is an apocalyptic number.

It is an amenable number.

31413081 is a deficient number, since it is larger than the sum of its proper divisors (16454503).

31413081 is a wasteful number, since it uses less digits than its factorization.

31413081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495871.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 31413081 is about 5604.7373711888. The cubic root of 31413081 is about 315.5272299335.

Adding to 31413081 its reverse (18031413), we get a palindrome (49444494).

The spelling of 31413081 in words is "thirty-one million, four hundred thirteen thousand, eighty-one".