172157853 has 32 divisors (see below), whose sum is σ = 271789056. Its totient is φ = 94889088.

The previous prime is 172157809. The next prime is 172157897. The reversal of 172157853 is 358751271.

It is an interprime number because it is at equal distance from previous prime (172157809) and next prime (172157897).

It is not a de Polignac number, because 172157853 - 2⁶ = 172157789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172152853) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73801 + ... + 76097.

It is an arithmetic number, because the mean of its divisors is an integer number (8493408).

Almost surely, 2^172157853 is an apocalyptic number.

It is an amenable number.

172157853 is a deficient number, since it is larger than the sum of its proper divisors (99631203).

172157853 is a wasteful number, since it uses less digits than its factorization.

172157853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2433.

The product of its digits is 58800, while the sum is 39.

The square root of 172157853 is about 13120.8937576676. The cubic root of 172157853 is about 556.2998540007.

The spelling of 172157853 in words is "one hundred seventy-two million, one hundred fifty-seven thousand, eight hundred fifty-three".