2291520 has 224 divisors, whose sum is σ = 9363456. Its totient is φ = 460800.

The previous prime is 2291491. The next prime is 2291539. The reversal of 2291520 is 251922.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73905 + ... + 73935.

2^2291520 is an apocalyptic number.

2291520 is a gapful number since it is divisible by the number (20) 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 2291520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4681728).

2291520 is an abundant number, since it is smaller than the sum of its proper divisors (7071936).

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

2291520 is a wasteful number, since it uses less digits than its factorization.

2291520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69 (or 59 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 2291520 is about 1513.7767338680. The cubic root of 2291520 is about 131.8381855565.

The spelling of 2291520 in words is "two million, two hundred ninety-one thousand, five hundred twenty".