2150691 has 4 divisors (see below), whose sum is σ = 2867592. Its totient is φ = 1433792.

The previous prime is 2150689. The next prime is 2150713. The reversal of 2150691 is 1960512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2150691 - 2¹ = 2150689 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (2150641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 358446 + ... + 358451.

It is an arithmetic number, because the mean of its divisors is an integer number (716898).

2^2150691 is an apocalyptic number.

2150691 is a deficient number, since it is larger than the sum of its proper divisors (716901).

2150691 is an equidigital number, since it uses as much as digits as its factorization.

2150691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716900.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 2150691 is about 1466.5234399763. The cubic root of 2150691 is about 129.0801136879.

The spelling of 2150691 in words is "two million, one hundred fifty thousand, six hundred ninety-one".