172245477 has 8 divisors (see below), whose sum is σ = 229727680. Its totient is φ = 114796800.

The previous prime is 172245457. The next prime is 172245499. The reversal of 172245477 is 774542271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 172245477 - 2⁸ = 172245221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172245407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8424 + ... + 20382.

It is an arithmetic number, because the mean of its divisors is an integer number (28715960).

Almost surely, 2^172245477 is an apocalyptic number.

It is an amenable number.

172245477 is a deficient number, since it is larger than the sum of its proper divisors (57482203).

172245477 is a wasteful number, since it uses less digits than its factorization.

172245477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16763.

The product of its digits is 109760, while the sum is 39.

The square root of 172245477 is about 13124.2324346988. The cubic root of 172245477 is about 556.3942188523.

The spelling of 172245477 in words is "one hundred seventy-two million, two hundred forty-five thousand, four hundred seventy-seven".