2155488 has 24 divisors (see below), whose sum is σ = 5658408. Its totient is φ = 718464.

The previous prime is 2155487. The next prime is 2155499. The reversal of 2155488 is 8845512.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×2155488² = 9292257036288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155487) 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, 11131 + ... + 11322.

It is an arithmetic number, because the mean of its divisors is an integer number (235767).

2^2155488 is an apocalyptic number.

It is an amenable number.

2155488 is an abundant number, since it is smaller than the sum of its proper divisors (3502920).

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

2155488 is a wasteful number, since it uses less digits than its factorization.

2155488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22466 (or 22458 counting only the distinct ones).

The product of its digits is 12800, while the sum is 33.

The square root of 2155488 is about 1468.1580296412. The cubic root of 2155488 is about 129.1760111635.

The spelling of 2155488 in words is "two million, one hundred fifty-five thousand, four hundred eighty-eight".