5139551 has 2 divisors, whose sum is σ = 5139552. Its totient is φ = 5139550.

The previous prime is 5139539. The next prime is 5139581. The reversal of 5139551 is 1559315.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5139551 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5139581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2569775 + 2569776.

It is an arithmetic number, because the mean of its divisors is an integer number (2569776).

Almost surely, 2^5139551 is an apocalyptic number.

5139551 is a deficient number, since it is larger than the sum of its proper divisors (1).

5139551 is an equidigital number, since it uses as much as digits as its factorization.

5139551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3375, while the sum is 29.

The square root of 5139551 is about 2267.0577848833. The cubic root of 5139551 is about 172.5738785976.

The spelling of 5139551 in words is "five million, one hundred thirty-nine thousand, five hundred fifty-one".