51544489 has 2 divisors, whose sum is σ = 51544490. Its totient is φ = 51544488.

The previous prime is 51544483. The next prime is 51544501. The reversal of 51544489 is 98444515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51194025 + 350464 = 7155^2 + 592^2 .

It is a cyclic number.

It is not a de Polignac number, because 51544489 - 2¹³ = 51536297 is a prime.

It is a super-2 number, since 2×51544489² = 5313668692542242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51544483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25772244 + 25772245.

It is an arithmetic number, because the mean of its divisors is an integer number (25772245).

Almost surely, 2^51544489 is an apocalyptic number.

It is an amenable number.

51544489 is a deficient number, since it is larger than the sum of its proper divisors (1).

51544489 is an equidigital number, since it uses as much as digits as its factorization.

51544489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 115200, while the sum is 40.

The square root of 51544489 is about 7179.4490735710. The cubic root of 51544489 is about 372.1580460169.

The spelling of 51544489 in words is "fifty-one million, five hundred forty-four thousand, four hundred eighty-nine".