4055019391 has 4 divisors (see below), whose sum is σ = 4055370592. Its totient is φ = 4054668192.

The previous prime is 4055019389. The next prime is 4055019413. The reversal of 4055019391 is 1939105504.

It is a happy number.

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 4055019391 - 2¹ = 4055019389 is a prime.

It is a super-2 number, since 2×4055019391² = 32886364522772021762, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4055019391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4055019191) 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, 157671 + ... + 181576.

It is an arithmetic number, because the mean of its divisors is an integer number (1013842648).

Almost surely, 2^4055019391 is an apocalyptic number.

4055019391 is a deficient number, since it is larger than the sum of its proper divisors (351201).

4055019391 is a wasteful number, since it uses less digits than its factorization.

4055019391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351200.

The product of its (nonzero) digits is 24300, while the sum is 37.

The square root of 4055019391 is about 63679.0341556780. The cubic root of 4055019391 is about 1594.6460879519.

The spelling of 4055019391 in words is "four billion, fifty-five million, nineteen thousand, three hundred ninety-one".