172401553 has 8 divisors (see below), whose sum is σ = 173416320. Its totient is φ = 171390480.

The previous prime is 172401479. The next prime is 172401557. The reversal of 172401553 is 355104271.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172401553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172401557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168678 + ... + 169696.

It is an arithmetic number, because the mean of its divisors is an integer number (21677040).

Almost surely, 2^172401553 is an apocalyptic number.

It is an amenable number.

172401553 is a deficient number, since it is larger than the sum of its proper divisors (1014767).

172401553 is a wasteful number, since it uses less digits than its factorization.

172401553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1847.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 172401553 is about 13130.1771884465. The cubic root of 172401553 is about 556.5622224279.

The spelling of 172401553 in words is "one hundred seventy-two million, four hundred one thousand, five hundred fifty-three".