2151730 has 32 divisors (see below), whose sum is σ = 4510080. Its totient is φ = 723840.

The previous prime is 2151703. The next prime is 2151767. The reversal of 2151730 is 371512.

It is a junction number, because it is equal to n+sod(n) for n = 2151698 and 2151707.

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, 3870 + ... + 4390.

It is an arithmetic number, because the mean of its divisors is an integer number (140940).

2^2151730 is an apocalyptic number.

2151730 is an abundant number, since it is smaller than the sum of its proper divisors (2358350).

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

2151730 is a wasteful number, since it uses less digits than its factorization.

2151730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594.

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 2151730 is about 1466.8776363419. The cubic root of 2151730 is about 129.1008965661.

The spelling of 2151730 in words is "two million, one hundred fifty-one thousand, seven hundred thirty".