31145251205 has 8 divisors (see below), whose sum is σ = 37382137632. Its totient is φ = 24910976848.

The previous prime is 31145251201. The next prime is 31145251219. The reversal of 31145251205 is 50215254113.

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

It is a cyclic number.

It is not a de Polignac number, because 31145251205 - 2² = 31145251201 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31145251201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 626687 + ... + 674556.

It is an arithmetic number, because the mean of its divisors is an integer number (4672767204).

Almost surely, 2^31145251205 is an apocalyptic number.

It is an amenable number.

31145251205 is a deficient number, since it is larger than the sum of its proper divisors (6236886427).

31145251205 is a wasteful number, since it uses less digits than its factorization.

31145251205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1306035.

The product of its (nonzero) digits is 6000, while the sum is 29.

The spelling of 31145251205 in words is "thirty-one billion, one hundred forty-five million, two hundred fifty-one thousand, two hundred five".