53223749 has 4 divisors (see below), whose sum is σ = 53245836. Its totient is φ = 53201664.

The previous prime is 53223739. The next prime is 53223757. The reversal of 53223749 is 94732235.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 49801249 + 3422500 = 7057^2 + 1850^2 .

It is a cyclic number.

It is not a de Polignac number, because 53223749 - 2⁴ = 53223733 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 (53223739) 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, 6914 + ... + 12419.

It is an arithmetic number, because the mean of its divisors is an integer number (13311459).

Almost surely, 2^53223749 is an apocalyptic number.

It is an amenable number.

53223749 is a deficient number, since it is larger than the sum of its proper divisors (22087).

53223749 is a wasteful number, since it uses less digits than its factorization.

53223749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22086.

The product of its digits is 45360, while the sum is 35.

The square root of 53223749 is about 7295.4608490485. The cubic root of 53223749 is about 376.1564277633.

The spelling of 53223749 in words is "fifty-three million, two hundred twenty-three thousand, seven hundred forty-nine".