26216261 has 16 divisors (see below), whose sum is σ = 29438640. Its totient is φ = 23224320.

The previous prime is 26216231. The next prime is 26216263. The reversal of 26216261 is 16261262.

It can be written as a sum of positive squares in 8 ways, for example, as 1515361 + 24700900 = 1231^2 + 4970^2 .

It is a cyclic number.

It is not a de Polignac number, because 26216261 - 2²² = 22021957 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26216261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26216263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19565 + ... + 20861.

It is an arithmetic number, because the mean of its divisors is an integer number (1839915).

Almost surely, 2^26216261 is an apocalyptic number.

It is an amenable number.

26216261 is a deficient number, since it is larger than the sum of its proper divisors (3222379).

26216261 is a wasteful number, since it uses less digits than its factorization.

26216261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1384.

The product of its digits is 1728, while the sum is 26.

The square root of 26216261 is about 5120.1817350559. The cubic root of 26216261 is about 297.0687148047.

The spelling of 26216261 in words is "twenty-six million, two hundred sixteen thousand, two hundred sixty-one".