31140455 has 4 divisors (see below), whose sum is σ = 37368552. Its totient is φ = 24912360.

The previous prime is 31140419. The next prime is 31140467. The reversal of 31140455 is 55404113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55404113 = 1193 ⋅46441.

It is not a de Polignac number, because 31140455 - 2⁶ = 31140391 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31140455.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3114041 + ... + 3114050.

It is an arithmetic number, because the mean of its divisors is an integer number (9342138).

Almost surely, 2^31140455 is an apocalyptic number.

31140455 is a deficient number, since it is larger than the sum of its proper divisors (6228097).

31140455 is an equidigital number, since it uses as much as digits as its factorization.

31140455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6228096.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 31140455 is about 5580.3633394251. The cubic root of 31140455 is about 314.6117834403.

Adding to 31140455 its reverse (55404113), we get a palindrome (86544568).

The spelling of 31140455 in words is "thirty-one million, one hundred forty thousand, four hundred fifty-five".