53442399 has 4 divisors (see below), whose sum is σ = 71256536. Its totient is φ = 35628264.

The previous prime is 53442397. The next prime is 53442413. The reversal of 53442399 is 99324435.

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

It is not a de Polignac number, because 53442399 - 2¹ = 53442397 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 (53442397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8907064 + ... + 8907069.

It is an arithmetic number, because the mean of its divisors is an integer number (17814134).

Almost surely, 2^53442399 is an apocalyptic number.

53442399 is a deficient number, since it is larger than the sum of its proper divisors (17814137).

53442399 is a wasteful number, since it uses less digits than its factorization.

53442399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17814136.

The product of its digits is 116640, while the sum is 39.

The square root of 53442399 is about 7310.4308354570. The cubic root of 53442399 is about 376.6708236504.

The spelling of 53442399 in words is "fifty-three million, four hundred forty-two thousand, three hundred ninety-nine".