5551381239 has 4 divisors (see below), whose sum is σ = 7401841656. Its totient is φ = 3700920824.

The previous prime is 5551381219. The next prime is 5551381243. The reversal of 5551381239 is 9321831555.

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 5551381239 - 2²⁰ = 5550332663 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5551381239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5551381219) 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, 925230204 + ... + 925230209.

It is an arithmetic number, because the mean of its divisors is an integer number (1850460414).

Almost surely, 2^5551381239 is an apocalyptic number.

5551381239 is a deficient number, since it is larger than the sum of its proper divisors (1850460417).

5551381239 is a wasteful number, since it uses less digits than its factorization.

5551381239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1850460416.

The product of its digits is 162000, while the sum is 42.

The square root of 5551381239 is about 74507.5918212366. The cubic root of 5551381239 is about 1770.6539168317.

The spelling of 5551381239 in words is "five billion, five hundred fifty-one million, three hundred eighty-one thousand, two hundred thirty-nine".