2163725 has 24 divisors (see below), whose sum is σ = 2892672. Its totient is φ = 1601600.

The previous prime is 2163703. The next prime is 2163737. The reversal of 2163725 is 5273612.

It is a de Polignac number, because none of the positive numbers 2^k-2163725 is a prime.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2163694 and 2163703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30440 + ... + 30510.

It is an arithmetic number, because the mean of its divisors is an integer number (120528).

2^2163725 is an apocalyptic number.

2163725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2163725 is a deficient number, since it is larger than the sum of its proper divisors (728947).

2163725 is a wasteful number, since it uses less digits than its factorization.

2163725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 152 counting only the distinct ones).

The product of its digits is 2520, while the sum is 26.

The square root of 2163725 is about 1470.9605705117. The cubic root of 2163725 is about 129.3403467755.

The spelling of 2163725 in words is "two million, one hundred sixty-three thousand, seven hundred twenty-five".