5100391 has 4 divisors (see below), whose sum is σ = 5400432. Its totient is φ = 4800352.

The previous prime is 5100371. The next prime is 5100397. The reversal of 5100391 is 1930015.

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 5100391 - 2⁹ = 5099879 is a prime.

It is a Duffinian number.

5100391 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5100397) 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, 149995 + ... + 150028.

It is an arithmetic number, because the mean of its divisors is an integer number (1350108).

Almost surely, 2^5100391 is an apocalyptic number.

5100391 is a deficient number, since it is larger than the sum of its proper divisors (300041).

5100391 is a wasteful number, since it uses less digits than its factorization.

5100391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300040.

The product of its (nonzero) digits is 135, while the sum is 19.

The square root of 5100391 is about 2258.4045253231. The cubic root of 5100391 is about 172.1344608396.

The spelling of 5100391 in words is "five million, one hundred thousand, three hundred ninety-one".