53440719 has 4 divisors (see below), whose sum is σ = 71254296. Its totient is φ = 35627144.

The previous prime is 53440693. The next prime is 53440729. The reversal of 53440719 is 91704435.

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

It is a cyclic number.

It is not a de Polignac number, because 53440719 - 2⁵ = 53440687 is a prime.

It is a super-2 number, since 2×53440719² = 5711820894473922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 53440719.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53440729) 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, 8906784 + ... + 8906789.

It is an arithmetic number, because the mean of its divisors is an integer number (17813574).

Almost surely, 2^53440719 is an apocalyptic number.

53440719 is a deficient number, since it is larger than the sum of its proper divisors (17813577).

53440719 is a wasteful number, since it uses less digits than its factorization.

53440719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17813576.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 53440719 is about 7310.3159302454. The cubic root of 53440719 is about 376.6668766369. Note that the first 3 decimals are identical.

The spelling of 53440719 in words is "fifty-three million, four hundred forty thousand, seven hundred nineteen".