2172553 has 4 divisors (see below), whose sum is σ = 2202388. Its totient is φ = 2142720.

The previous prime is 2172551. The next prime is 2172559. The reversal of 2172553 is 3552712.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 751689 + 1420864 = 867^2 + 1192^2 .

It is a cyclic number.

It is not a de Polignac number, because 2172553 - 2¹ = 2172551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2172551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14808 + ... + 14953.

It is an arithmetic number, because the mean of its divisors is an integer number (550597).

2^2172553 is an apocalyptic number.

It is an amenable number.

2172553 is a deficient number, since it is larger than the sum of its proper divisors (29835).

2172553 is an equidigital number, since it uses as much as digits as its factorization.

2172553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29834.

The product of its digits is 2100, while the sum is 25.

The square root of 2172553 is about 1473.9582762073. The cubic root of 2172553 is about 129.5160109997.

The spelling of 2172553 in words is "two million, one hundred seventy-two thousand, five hundred fifty-three".