15226891 has 2 divisors, whose sum is σ = 15226892. Its totient is φ = 15226890.

The previous prime is 15226853. The next prime is 15226901. The reversal of 15226891 is 19862251.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15226891 - 2⁷ = 15226763 is a prime.

It is not a weakly prime, because it can be changed into another prime (15226831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7613445 + 7613446.

It is an arithmetic number, because the mean of its divisors is an integer number (7613446).

Almost surely, 2^15226891 is an apocalyptic number.

15226891 is a deficient number, since it is larger than the sum of its proper divisors (1).

15226891 is an equidigital number, since it uses as much as digits as its factorization.

15226891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 34.

The square root of 15226891 is about 3902.1649119431. The cubic root of 15226891 is about 247.8584596003.

The spelling of 15226891 in words is "fifteen million, two hundred twenty-six thousand, eight hundred ninety-one".