210031312357 has 2 divisors, whose sum is σ = 210031312358. Its totient is φ = 210031312356.

The previous prime is 210031312331. The next prime is 210031312399. The reversal of 210031312357 is 753213130012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 175851067716 + 34180244641 = 419346^2 + 184879^2 .

It is a cyclic number.

It is not a de Polignac number, because 210031312357 - 2¹¹ = 210031310309 is a prime.

It is a super-2 number, since 2×210031312357² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210031312307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105015656178 + 105015656179.

It is an arithmetic number, because the mean of its divisors is an integer number (105015656179).

Almost surely, 2^210031312357 is an apocalyptic number.

It is an amenable number.

210031312357 is a deficient number, since it is larger than the sum of its proper divisors (1).

210031312357 is an equidigital number, since it uses as much as digits as its factorization.

210031312357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 28.

Adding to 210031312357 its reverse (753213130012), we get a palindrome (963244442369).

The spelling of 210031312357 in words is "two hundred ten billion, thirty-one million, three hundred twelve thousand, three hundred fifty-seven".