2251530 has 64 divisors (see below), whose sum is σ = 6220800. Its totient is φ = 578880.

The previous prime is 2251517. The next prime is 2251547. The reversal of 2251530 is 351522.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

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, 8236 + ... + 8504.

It is an arithmetic number, because the mean of its divisors is an integer number (97200).

2^2251530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2251530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3110400).

2251530 is an abundant number, since it is smaller than the sum of its proper divisors (3969270).

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

2251530 is a wasteful number, since it uses less digits than its factorization.

2251530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316 (or 310 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 2251530 is about 1500.5099133295. The cubic root of 2251530 is about 131.0667647164.

The spelling of 2251530 in words is "two million, two hundred fifty-one thousand, five hundred thirty".