2515091 has 4 divisors (see below), whose sum is σ = 2556384. Its totient is φ = 2473800.

The previous prime is 2515081. The next prime is 2515103. The reversal of 2515091 is 1905152.

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 2515091 - 2¹⁴ = 2498707 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2515081) 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, 20555 + ... + 20676.

It is an arithmetic number, because the mean of its divisors is an integer number (639096).

2^2515091 is an apocalyptic number.

2515091 is a deficient number, since it is larger than the sum of its proper divisors (41293).

2515091 is an equidigital number, since it uses as much as digits as its factorization.

2515091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41292.

The product of its (nonzero) digits is 450, while the sum is 23.

The square root of 2515091 is about 1585.9038432389. The cubic root of 2515091 is about 135.9934216830.

The spelling of 2515091 in words is "two million, five hundred fifteen thousand, ninety-one".