2191950 has 36 divisors (see below), whose sum is σ = 5890248. Its totient is φ = 584400.

The previous prime is 2191949. The next prime is 2191951. The reversal of 2191950 is 591912.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2191949) and next prime (2191951).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2191951) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1986 + ... + 2885.

It is an arithmetic number, because the mean of its divisors is an integer number (163618).

2^2191950 is an apocalyptic number.

2191950 is an abundant number, since it is smaller than the sum of its proper divisors (3698298).

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

2191950 is a wasteful number, since it uses less digits than its factorization.

2191950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4889 (or 4881 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 27.

The square root of 2191950 is about 1480.5235560436. The cubic root of 2191950 is about 129.9003180623.

The spelling of 2191950 in words is "two million, one hundred ninety-one thousand, nine hundred fifty".