2155192 has 64 divisors (see below), whose sum is σ = 4898880. Its totient is φ = 878592.

The previous prime is 2155187. The next prime is 2155201. The reversal of 2155192 is 2915512.

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, 40638 + ... + 40690.

It is an arithmetic number, because the mean of its divisors is an integer number (76545).

2^2155192 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2155192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2449440).

2155192 is an abundant number, since it is smaller than the sum of its proper divisors (2743688).

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

2155192 is a wasteful number, since it uses less digits than its factorization.

2155192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112 (or 108 counting only the distinct ones).

The product of its digits is 900, while the sum is 25.

The square root of 2155192 is about 1468.0572195933. The cubic root of 2155192 is about 129.1700979086.

The spelling of 2155192 in words is "two million, one hundred fifty-five thousand, one hundred ninety-two".