31144201357 has 2 divisors, whose sum is σ = 31144201358. Its totient is φ = 31144201356.

The previous prime is 31144201351. The next prime is 31144201393. The reversal of 31144201357 is 75310244113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23529719236 + 7614482121 = 153394^2 + 87261^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31144201357 is a prime.

It is a super-2 number, since 2×31144201357² (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 (31144201351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15572100678 + 15572100679.

It is an arithmetic number, because the mean of its divisors is an integer number (15572100679).

Almost surely, 2^31144201357 is an apocalyptic number.

It is an amenable number.

31144201357 is a deficient number, since it is larger than the sum of its proper divisors (1).

31144201357 is an equidigital number, since it uses as much as digits as its factorization.

31144201357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 31.

The spelling of 31144201357 in words is "thirty-one billion, one hundred forty-four million, two hundred one thousand, three hundred fifty-seven".