2155430 has 32 divisors (see below), whose sum is σ = 4250880. Its totient is φ = 783360.

The previous prime is 2155429. The next prime is 2155451. The reversal of 2155430 is 345512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5066 + ... + 5474.

It is an arithmetic number, because the mean of its divisors is an integer number (132840).

2^2155430 is an apocalyptic number.

2155430 is a deficient number, since it is larger than the sum of its proper divisors (2095450).

2155430 is a wasteful number, since it uses less digits than its factorization.

2155430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 2155430 is about 1468.1382768663. The cubic root of 2155430 is about 129.1748525278.

The spelling of 2155430 in words is "two million, one hundred fifty-five thousand, four hundred thirty".