31240233853 has 2 divisors, whose sum is σ = 31240233854. Its totient is φ = 31240233852.

The previous prime is 31240233839. The next prime is 31240233859. The reversal of 31240233853 is 35833204213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26458926244 + 4781307609 = 162662^2 + 69147^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31240233853 is a prime.

It is a super-2 number, since 2×31240233853² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31240233859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15620116926 + 15620116927.

It is an arithmetic number, because the mean of its divisors is an integer number (15620116927).

Almost surely, 2^31240233853 is an apocalyptic number.

It is an amenable number.

31240233853 is a deficient number, since it is larger than the sum of its proper divisors (1).

31240233853 is an equidigital number, since it uses as much as digits as its factorization.

31240233853 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 34.

The spelling of 31240233853 in words is "thirty-one billion, two hundred forty million, two hundred thirty-three thousand, eight hundred fifty-three".