2157123236053 has 2 divisors, whose sum is σ = 2157123236054. Its totient is φ = 2157123236052.

The previous prime is 2157123236011. The next prime is 2157123236063. The reversal of 2157123236053 is 3506323217512.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1429406754084 + 727716481969 = 1195578^2 + 853063^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2157123236053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2157123235997 and 2157123236015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2157123236063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078561618026 + 1078561618027.

It is an arithmetic number, because the mean of its divisors is an integer number (1078561618027).

Almost surely, 2^{2157123236053} is an apocalyptic number.

It is an amenable number.

2157123236053 is a deficient number, since it is larger than the sum of its proper divisors (1).

2157123236053 is an equidigital number, since it uses as much as digits as its factorization.

2157123236053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 226800, while the sum is 40.

The spelling of 2157123236053 in words is "two trillion, one hundred fifty-seven billion, one hundred twenty-three million, two hundred thirty-six thousand, fifty-three".