2155470 has 16 divisors (see below), whose sum is σ = 5173200. Its totient is φ = 574784.

The previous prime is 2155463. The next prime is 2155477. The reversal of 2155470 is 745512.

2155470 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2155463) and next prime (2155477).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2155470.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35895 + ... + 35954.

It is an arithmetic number, because the mean of its divisors is an integer number (323325).

2^2155470 is an apocalyptic number.

2155470 is an abundant number, since it is smaller than the sum of its proper divisors (3017730).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2155470 is a wasteful number, since it uses less digits than its factorization.

2155470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71859.

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 2155470 is about 1468.1518994981. The cubic root of 2155470 is about 129.1756515891.

The spelling of 2155470 in words is "two million, one hundred fifty-five thousand, four hundred seventy".