2615651 has 2 divisors, whose sum is σ = 2615652. Its totient is φ = 2615650.

The previous prime is 2615623. The next prime is 2615653. The reversal of 2615651 is 1565162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2615651 - 2¹⁰ = 2614627 is a prime.

Together with 2615653, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2615651.

It is not a weakly prime, because it can be changed into another prime (2615653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1307825 + 1307826.

It is an arithmetic number, because the mean of its divisors is an integer number (1307826).

2^2615651 is an apocalyptic number.

2615651 is a deficient number, since it is larger than the sum of its proper divisors (1).

2615651 is an equidigital number, since it uses as much as digits as its factorization.

2615651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 26.

The square root of 2615651 is about 1617.2974370845. The cubic root of 2615651 is about 137.7822477786.

The spelling of 2615651 in words is "two million, six hundred fifteen thousand, six hundred fifty-one".