2155472 has 40 divisors (see below), whose sum is σ = 4693152. Its totient is φ = 950400.

The previous prime is 2155463. The next prime is 2155477. The reversal of 2155472 is 2745512.

It is an Ulam number.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6347 + ... + 6677.

2^2155472 is an apocalyptic number.

2155472 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2155472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2346576).

2155472 is an abundant number, since it is smaller than the sum of its proper divisors (2537680).

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

2155472 is a wasteful number, since it uses less digits than its factorization.

2155472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387 (or 381 counting only the distinct ones).

The product of its digits is 2800, while the sum is 26.

The square root of 2155472 is about 1468.1525806264. The cubic root of 2155472 is about 129.1756915419.

The spelling of 2155472 in words is "two million, one hundred fifty-five thousand, four hundred seventy-two".