264243551 has 12 divisors (see below), whose sum is σ = 312793656. Its totient is φ = 221741520.

The previous prime is 264243547. The next prime is 264243569. The reversal of 264243551 is 155342462.

264243551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 264243551 - 2² = 264243547 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264243571) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 82421 + ... + 85566.

It is an arithmetic number, because the mean of its divisors is an integer number (26066138).

Almost surely, 2^264243551 is an apocalyptic number.

264243551 is a deficient number, since it is larger than the sum of its proper divisors (48550105).

264243551 is a wasteful number, since it uses less digits than its factorization.

264243551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168022 (or 168011 counting only the distinct ones).

The product of its digits is 28800, while the sum is 32.

The square root of 264243551 is about 16255.5698454407. The cubic root of 264243551 is about 641.7040776374.

The spelling of 264243551 in words is "two hundred sixty-four million, two hundred forty-three thousand, five hundred fifty-one".