52155691213 has 2 divisors, whose sum is σ = 52155691214. Its totient is φ = 52155691212.

The previous prime is 52155691199. The next prime is 52155691303. The reversal of 52155691213 is 31219655125.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34327566729 + 17828124484 = 185277^2 + 133522^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52155691213 is a prime.

It is a super-2 number, since 2×52155691213² (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 (52155698213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26077845606 + 26077845607.

It is an arithmetic number, because the mean of its divisors is an integer number (26077845607).

Almost surely, 2^52155691213 is an apocalyptic number.

It is an amenable number.

52155691213 is a deficient number, since it is larger than the sum of its proper divisors (1).

52155691213 is an equidigital number, since it uses as much as digits as its factorization.

52155691213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81000, while the sum is 40.

The spelling of 52155691213 in words is "fifty-two billion, one hundred fifty-five million, six hundred ninety-one thousand, two hundred thirteen".