172245371 has 2 divisors, whose sum is σ = 172245372. Its totient is φ = 172245370.

The previous prime is 172245347. The next prime is 172245373. The reversal of 172245371 is 173542271.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172245371 is a prime.

It is a Sophie Germain prime.

Together with 172245373, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (172245373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86122685 + 86122686.

It is an arithmetic number, because the mean of its divisors is an integer number (86122686).

Almost surely, 2^172245371 is an apocalyptic number.

172245371 is a deficient number, since it is larger than the sum of its proper divisors (1).

172245371 is an equidigital number, since it uses as much as digits as its factorization.

172245371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11760, while the sum is 32.

The square root of 172245371 is about 13124.2283963668. The cubic root of 172245371 is about 556.3941047171.

The spelling of 172245371 in words is "one hundred seventy-two million, two hundred forty-five thousand, three hundred seventy-one".