172198455 has 32 divisors (see below), whose sum is σ = 323688960. Its totient is φ = 77066880.

The previous prime is 172198441. The next prime is 172198469. The reversal of 172198455 is 554891271.

It is an interprime number because it is at equal distance from previous prime (172198441) and next prime (172198469).

It is not a de Polignac number, because 172198455 - 2⁶ = 172198391 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37995 + ... + 42284.

It is an arithmetic number, because the mean of its divisors is an integer number (10115280).

Almost surely, 2^172198455 is an apocalyptic number.

172198455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

172198455 is a deficient number, since it is larger than the sum of its proper divisors (151490505).

172198455 is a wasteful number, since it uses less digits than its factorization.

172198455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80311.

The product of its digits is 100800, while the sum is 42.

The square root of 172198455 is about 13122.4408933704. The cubic root of 172198455 is about 556.3435834635.

The spelling of 172198455 in words is "one hundred seventy-two million, one hundred ninety-eight thousand, four hundred fifty-five".