2515651 has 2 divisors, whose sum is σ = 2515652. Its totient is φ = 2515650.

The previous prime is 2515633. The next prime is 2515673. The reversal of 2515651 is 1565152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2515651 - 2⁷ = 2515523 is a prime.

It is not a weakly prime, because it can be changed into another prime (2515621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1257825 + 1257826.

It is an arithmetic number, because the mean of its divisors is an integer number (1257826).

2^2515651 is an apocalyptic number.

2515651 is a deficient number, since it is larger than the sum of its proper divisors (1).

2515651 is an equidigital number, since it uses as much as digits as its factorization.

2515651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1500, while the sum is 25.

The square root of 2515651 is about 1586.0803888832. The cubic root of 2515651 is about 136.0035141826.

The spelling of 2515651 in words is "two million, five hundred fifteen thousand, six hundred fifty-one".