31545130 has 16 divisors (see below), whose sum is σ = 59770080. Its totient is φ = 11953872.

The previous prime is 31545119. The next prime is 31545181. The reversal of 31545130 is 3154513.

It is a happy number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 82824 + ... + 83203.

It is an arithmetic number, because the mean of its divisors is an integer number (3735630).

Almost surely, 2^31545130 is an apocalyptic number.

31545130 is a deficient number, since it is larger than the sum of its proper divisors (28224950).

31545130 is a wasteful number, since it uses less digits than its factorization.

31545130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166053.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 31545130 is about 5616.5051410998. The cubic root of 31545130 is about 315.9687318845.

Adding to 31545130 its reverse (3154513), we get a palindrome (34699643).

The spelling of 31545130 in words is "thirty-one million, five hundred forty-five thousand, one hundred thirty".