172055305451 has 2 divisors, whose sum is σ = 172055305452. Its totient is φ = 172055305450.

The previous prime is 172055305447. The next prime is 172055305553. The reversal of 172055305451 is 154503550271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 172055305451 - 2² = 172055305447 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (172055305441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86027652725 + 86027652726.

It is an arithmetic number, because the mean of its divisors is an integer number (86027652726).

Almost surely, 2^172055305451 is an apocalyptic number.

172055305451 is a deficient number, since it is larger than the sum of its proper divisors (1).

172055305451 is an equidigital number, since it uses as much as digits as its factorization.

172055305451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105000, while the sum is 38.

The spelling of 172055305451 in words is "one hundred seventy-two billion, fifty-five million, three hundred five thousand, four hundred fifty-one".