10515551 has 2 divisors, whose sum is σ = 10515552. Its totient is φ = 10515550.

The previous prime is 10515509. The next prime is 10515559. The reversal of 10515551 is 15551501.

It is a happy number.

10515551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10515551 is a prime.

It is a super-2 number, since 2×10515551² = 221153625667202, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10515559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5257775 + 5257776.

It is an arithmetic number, because the mean of its divisors is an integer number (5257776).

Almost surely, 2^10515551 is an apocalyptic number.

10515551 is a deficient number, since it is larger than the sum of its proper divisors (1).

10515551 is an equidigital number, since it uses as much as digits as its factorization.

10515551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 625, while the sum is 23.

The square root of 10515551 is about 3242.7690327866. The cubic root of 10515551 is about 219.0840082755.

The spelling of 10515551 in words is "ten million, five hundred fifteen thousand, five hundred fifty-one".