53139819 has 8 divisors (see below), whose sum is σ = 70973392. Its totient is φ = 35366400.

The previous prime is 53139817. The next prime is 53139833. The reversal of 53139819 is 91893135.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 53139819 - 2¹ = 53139817 is a prime.

It is a super-2 number, since 2×53139819² = 5647680726705522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53139817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12934 + ... + 16539.

It is an arithmetic number, because the mean of its divisors is an integer number (8871674).

Almost surely, 2^53139819 is an apocalyptic number.

53139819 is a deficient number, since it is larger than the sum of its proper divisors (17833573).

53139819 is a wasteful number, since it uses less digits than its factorization.

53139819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30077.

The product of its digits is 29160, while the sum is 39.

The square root of 53139819 is about 7289.7063726874. The cubic root of 53139819 is about 375.9585999196.

The spelling of 53139819 in words is "fifty-three million, one hundred thirty-nine thousand, eight hundred nineteen".