2155624 has 16 divisors (see below), whose sum is σ = 4111200. Its totient is φ = 1059312.

The previous prime is 2155613. The next prime is 2155627. The reversal of 2155624 is 4265512.

It is not an unprimeable number, because it can be changed into a prime (2155627) 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, 1812 + ... + 2755.

It is an arithmetic number, because the mean of its divisors is an integer number (256950).

2^2155624 is an apocalyptic number.

It is an amenable number.

2155624 is a deficient number, since it is larger than the sum of its proper divisors (1955576).

2155624 is a wasteful number, since it uses less digits than its factorization.

2155624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4632 (or 4628 counting only the distinct ones).

The product of its digits is 2400, while the sum is 25.

The square root of 2155624 is about 1468.2043454506. The cubic root of 2155624 is about 129.1787278829.

The spelling of 2155624 in words is "two million, one hundred fifty-five thousand, six hundred twenty-four".