91155451 has 2 divisors, whose sum is σ = 91155452. Its totient is φ = 91155450.

The previous prime is 91155431. The next prime is 91155461. The reversal of 91155451 is 15455119.

It is a strong prime.

It is an emirp because it is prime and its reverse (15455119) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91155451 - 2¹⁷ = 91024379 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (91155431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45577725 + 45577726.

It is an arithmetic number, because the mean of its divisors is an integer number (45577726).

Almost surely, 2^91155451 is an apocalyptic number.

91155451 is a deficient number, since it is larger than the sum of its proper divisors (1).

91155451 is an equidigital number, since it uses as much as digits as its factorization.

91155451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4500, while the sum is 31.

The square root of 91155451 is about 9547.5363838008. The cubic root of 91155451 is about 450.0501195205.

The spelling of 91155451 in words is "ninety-one million, one hundred fifty-five thousand, four hundred fifty-one".