31130001 has 24 divisors (see below), whose sum is σ = 53295424. Its totient is φ = 17787600.

The previous prime is 31129991. The next prime is 31130039. The reversal of 31130001 is 10003113.

It is not a de Polignac number, because 31130001 - 2⁶ = 31129937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (31130051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7450 + ... + 10851.

Almost surely, 2^31130001 is an apocalyptic number.

It is an amenable number.

31130001 is a deficient number, since it is larger than the sum of its proper divisors (22165423).

31130001 is an equidigital number, since it uses as much as digits as its factorization.

31130001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18323 (or 18311 counting only the distinct ones).

The product of its (nonzero) digits is 9, while the sum is 9.

The square root of 31130001 is about 5579.4265834403. The cubic root of 31130001 is about 314.5765739387.

Adding to 31130001 its reverse (10003113), we get a palindrome (41133114).

The spelling of 31130001 in words is "thirty-one million, one hundred thirty thousand, one".