2157715172267 has 2 divisors, whose sum is σ = 2157715172268. Its totient is φ = 2157715172266.

The previous prime is 2157715172233. The next prime is 2157715172281. The reversal of 2157715172267 is 7622715177512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2157715172267 - 2⁶ = 2157715172203 is a prime.

It is not a weakly prime, because it can be changed into another prime (2157715102267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078857586133 + 1078857586134.

It is an arithmetic number, because the mean of its divisors is an integer number (1078857586134).

Almost surely, 2^{2157715172267} is an apocalyptic number.

2157715172267 is a deficient number, since it is larger than the sum of its proper divisors (1).

2157715172267 is an equidigital number, since it uses as much as digits as its factorization.

2157715172267 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2881200, while the sum is 53.

The spelling of 2157715172267 in words is "two trillion, one hundred fifty-seven billion, seven hundred fifteen million, one hundred seventy-two thousand, two hundred sixty-seven".