53467721 has 4 divisors (see below), whose sum is σ = 53490372. Its totient is φ = 53445072.

The previous prime is 53467693. The next prime is 53467727. The reversal of 53467721 is 12776435.

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 8094025 + 45373696 = 2845^2 + 6736^2 .

It is a cyclic number.

It is not a de Polignac number, because 53467721 - 2⁶ = 53467657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53467727) 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, 7310 + ... + 12663.

It is an arithmetic number, because the mean of its divisors is an integer number (13372593).

Almost surely, 2^53467721 is an apocalyptic number.

It is an amenable number.

53467721 is a deficient number, since it is larger than the sum of its proper divisors (22651).

53467721 is a wasteful number, since it uses less digits than its factorization.

53467721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22650.

The product of its digits is 35280, while the sum is 35.

The square root of 53467721 is about 7312.1625392219. The cubic root of 53467721 is about 376.7303054647.

The spelling of 53467721 in words is "fifty-three million, four hundred sixty-seven thousand, seven hundred twenty-one".