31230045 has 48 divisors (see below), whose sum is σ = 67496832. Its totient is φ = 12977280.

The previous prime is 31230029. The next prime is 31230049. The reversal of 31230045 is 54003213.

It is not a de Polignac number, because 31230045 - 2⁴ = 31230029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31230049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1042 + ... + 7971.

It is an arithmetic number, because the mean of its divisors is an integer number (1406184).

Almost surely, 2^31230045 is an apocalyptic number.

31230045 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31230045 is an abundant number, since it is smaller than the sum of its proper divisors (36266787).

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

31230045 is a wasteful number, since it uses less digits than its factorization.

31230045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9042 (or 9039 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 31230045 is about 5588.3848292687. The cubic root of 31230045 is about 314.9132035992.

Adding to 31230045 its reverse (54003213), we get a palindrome (85233258).

The spelling of 31230045 in words is "thirty-one million, two hundred thirty thousand, forty-five".