31004045 has 8 divisors (see below), whose sum is σ = 38487960. Its totient is φ = 23947840.

The previous prime is 31004041. The next prime is 31004047. The reversal of 31004045 is 54040013.

It can be written as a sum of positive squares in 4 ways, for example, as 743044 + 30261001 = 862^2 + 5501^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31004045 - 2² = 31004041 is a prime.

It is a super-2 number, since 2×31004045² = 1922501612724050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31004041) 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 7 ways as a sum of consecutive naturals, for example, 106766 + ... + 107055.

It is an arithmetic number, because the mean of its divisors is an integer number (4810995).

Almost surely, 2^31004045 is an apocalyptic number.

It is an amenable number.

31004045 is a deficient number, since it is larger than the sum of its proper divisors (7483915).

31004045 is a wasteful number, since it uses less digits than its factorization.

31004045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213855.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 31004045 is about 5568.1276027045. The cubic root of 31004045 is about 314.1517279618.

Adding to 31004045 its reverse (54040013), we get a palindrome (85044058).

The spelling of 31004045 in words is "thirty-one million, four thousand, forty-five".