91254211 has 4 divisors (see below), whose sum is σ = 91546072. Its totient is φ = 90962352.

The previous prime is 91254203. The next prime is 91254223. The reversal of 91254211 is 11245219.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11245219 = 31 ⋅362749.

It is a cyclic number.

It is not a de Polignac number, because 91254211 - 2³ = 91254203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91254811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145461 + ... + 146086.

It is an arithmetic number, because the mean of its divisors is an integer number (22886518).

Almost surely, 2^91254211 is an apocalyptic number.

91254211 is a deficient number, since it is larger than the sum of its proper divisors (291861).

91254211 is a wasteful number, since it uses less digits than its factorization.

91254211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291860.

The product of its digits is 720, while the sum is 25.

The square root of 91254211 is about 9552.7069985424. The cubic root of 91254211 is about 450.2125925536.

The spelling of 91254211 in words is "ninety-one million, two hundred fifty-four thousand, two hundred eleven".