31142320245 has 24 divisors (see below), whose sum is σ = 53984133216. Its totient is φ = 16607972448.

The previous prime is 31142320243. The next prime is 31142320249. The reversal of 31142320245 is 54202324113.

31142320245 is a `hidden beast` number, since 31 + 1 + 423 + 202 + 4 + 5 = 666.

It is not a de Polignac number, because 31142320245 - 2¹ = 31142320243 is a prime.

It is a super-2 number, since 2×31142320245² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31142320241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1100362 + ... + 1128308.

It is an arithmetic number, because the mean of its divisors is an integer number (2249338884).

Almost surely, 2^31142320245 is an apocalyptic number.

It is an amenable number.

31142320245 is a deficient number, since it is larger than the sum of its proper divisors (22841812971).

31142320245 is a wasteful number, since it uses less digits than its factorization.

31142320245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52721 (or 52718 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 31142320245 its reverse (54202324113), we get a palindrome (85344644358).

The spelling of 31142320245 in words is "thirty-one billion, one hundred forty-two million, three hundred twenty thousand, two hundred forty-five".