2151830 has 8 divisors (see below), whose sum is σ = 3873312. Its totient is φ = 860728.

The previous prime is 2151827. The next prime is 2151847. The reversal of 2151830 is 381512.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 107582 + ... + 107601.

It is an arithmetic number, because the mean of its divisors is an integer number (484164).

2^2151830 is an apocalyptic number.

2151830 is a deficient number, since it is larger than the sum of its proper divisors (1721482).

2151830 is a wasteful number, since it uses less digits than its factorization.

2151830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215190.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 2151830 is about 1466.9117219519. The cubic root of 2151830 is about 129.1028964901.

The spelling of 2151830 in words is "two million, one hundred fifty-one thousand, eight hundred thirty".