5151581 has 2 divisors, whose sum is σ = 5151582. Its totient is φ = 5151580.

The previous prime is 5151577. The next prime is 5151583. The reversal of 5151581 is 1851515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5040025 + 111556 = 2245^2 + 334^2 .

It is a cyclic number.

It is not a de Polignac number, because 5151581 - 2² = 5151577 is a prime.

It is a super-2 number, since 2×5151581² = 53077573599122, which contains 22 as substring.

Together with 5151583, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5151581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5151583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2575790 + 2575791.

It is an arithmetic number, because the mean of its divisors is an integer number (2575791).

Almost surely, 2^5151581 is an apocalyptic number.

It is an amenable number.

5151581 is a deficient number, since it is larger than the sum of its proper divisors (1).

5151581 is an equidigital number, since it uses as much as digits as its factorization.

5151581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1000, while the sum is 26.

The square root of 5151581 is about 2269.7094527714. The cubic root of 5151581 is about 172.7084199267.

The spelling of 5151581 in words is "five million, one hundred fifty-one thousand, five hundred eighty-one".