51459481 has 2 divisors, whose sum is σ = 51459482. Its totient is φ = 51459480.

The previous prime is 51459439. The next prime is 51459509. The reversal of 51459481 is 18495415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50537881 + 921600 = 7109^2 + 960^2 .

It is a cyclic number.

It is not a de Polignac number, because 51459481 - 2⁹ = 51458969 is a prime.

It is a super-2 number, since 2×51459481² = 5296156369578722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51459481.

It is not a weakly prime, because it can be changed into another prime (51459181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25729740 + 25729741.

It is an arithmetic number, because the mean of its divisors is an integer number (25729741).

Almost surely, 2^51459481 is an apocalyptic number.

It is an amenable number.

51459481 is a deficient number, since it is larger than the sum of its proper divisors (1).

51459481 is an equidigital number, since it uses as much as digits as its factorization.

51459481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28800, while the sum is 37.

The square root of 51459481 is about 7173.5263991987. The cubic root of 51459481 is about 371.9533437651.

It can be divided in two parts, 514 and 59481, that added together give a palindrome (59995).

The spelling of 51459481 in words is "fifty-one million, four hundred fifty-nine thousand, four hundred eighty-one".