2172570134837 has 2 divisors, whose sum is σ = 2172570134838. Its totient is φ = 2172570134836.

The previous prime is 2172570134831. The next prime is 2172570134923. The reversal of 2172570134837 is 7384310752712.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1186936165156 + 985633969681 = 1089466^2 + 992791^2 .

It is a cyclic number.

It is not a de Polignac number, because 2172570134837 - 2¹² = 2172570130741 is a prime.

It is a super-2 number, since 2×2172570134837² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2172570134831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1086285067418 + 1086285067419.

It is an arithmetic number, because the mean of its divisors is an integer number (1086285067419).

Almost surely, 2^{2172570134837} is an apocalyptic number.

It is an amenable number.

2172570134837 is a deficient number, since it is larger than the sum of its proper divisors (1).

2172570134837 is an equidigital number, since it uses as much as digits as its factorization.

2172570134837 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1975680, while the sum is 50.

The spelling of 2172570134837 in words is "two trillion, one hundred seventy-two billion, five hundred seventy million, one hundred thirty-four thousand, eight hundred thirty-seven".