172020475 has 12 divisors (see below), whose sum is σ = 232697160. Its totient is φ = 125105600.

The previous prime is 172020469. The next prime is 172020481. The reversal of 172020475 is 574020271.

172020475 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (172020469) and next prime (172020481).

It is not a de Polignac number, because 172020475 - 2⁹ = 172019963 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 312490 + ... + 313039.

It is an arithmetic number, because the mean of its divisors is an integer number (19391430).

Almost surely, 2^172020475 is an apocalyptic number.

172020475 is a deficient number, since it is larger than the sum of its proper divisors (60676685).

172020475 is a wasteful number, since it uses less digits than its factorization.

172020475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625550 (or 625545 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 172020475 is about 13115.6576274314. The cubic root of 172020475 is about 556.1518431354.

The spelling of 172020475 in words is "one hundred seventy-two million, twenty thousand, four hundred seventy-five".