31140045 has 40 divisors (see below), whose sum is σ = 58265856. Its totient is φ = 15881184.

The previous prime is 31140029. The next prime is 31140047. The reversal of 31140045 is 54004113.

It is a happy number.

It is not a de Polignac number, because 31140045 - 2⁴ = 31140029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31140047) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 7644 + ... + 10986.

Almost surely, 2^31140045 is an apocalyptic number.

It is an amenable number.

31140045 is a deficient number, since it is larger than the sum of its proper divisors (27125811).

31140045 is a wasteful number, since it uses less digits than its factorization.

31140045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3383 (or 3374 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 31140045 is about 5580.3266033450. The cubic root of 31140045 is about 314.6104026919.

Adding to 31140045 its reverse (54004113), we get a palindrome (85144158).

The spelling of 31140045 in words is "thirty-one million, one hundred forty thousand, forty-five".