11097551 has 2 divisors, whose sum is σ = 11097552. Its totient is φ = 11097550.

The previous prime is 11097497. The next prime is 11097571. The reversal of 11097551 is 15579011.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11097551 is a prime.

It is a Chen prime.

It is equal to p₇₃₂₅₅₇ and since 11097551 and 732557 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11097571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5548775 + 5548776.

It is an arithmetic number, because the mean of its divisors is an integer number (5548776).

Almost surely, 2^11097551 is an apocalyptic number.

11097551 is a deficient number, since it is larger than the sum of its proper divisors (1).

11097551 is an equidigital number, since it uses as much as digits as its factorization.

11097551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1575, while the sum is 29.

The square root of 11097551 is about 3331.2986957041. The cubic root of 11097551 is about 223.0535038892.

The spelling of 11097551 in words is "eleven million, ninety-seven thousand, five hundred fifty-one".