31229045 has 8 divisors (see below), whose sum is σ = 37819320. Its totient is φ = 24753600.

The previous prime is 31229041. The next prime is 31229057. The reversal of 31229045 is 54092213.

It can be written as a sum of positive squares in 4 ways, for example, as 1787569 + 29441476 = 1337^2 + 5426^2 .

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

It is not a de Polignac number, because 31229045 - 2² = 31229041 is a prime.

It is a super-2 number, since 2×31229045² = 1950506503224050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31229041) 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, 28106 + ... + 29195.

It is an arithmetic number, because the mean of its divisors is an integer number (4727415).

Almost surely, 2^31229045 is an apocalyptic number.

It is an amenable number.

31229045 is a deficient number, since it is larger than the sum of its proper divisors (6590275).

31229045 is a wasteful number, since it uses less digits than its factorization.

31229045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57415.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 31229045 is about 5588.2953572624. The cubic root of 31229045 is about 314.9098423428.

It can be divided in two parts, 3122 and 9045, that added together give a cube (12167 = 23³).

The spelling of 31229045 in words is "thirty-one million, two hundred twenty-nine thousand, forty-five".