51365889 has 9 divisors (see below), whose sum is σ = 74226243. Its totient is φ = 34229592.

The previous prime is 51365887. The next prime is 51365893. The reversal of 51365889 is 98856315.

The square root of 51365889 is 7167.

It is a perfect power (a square), and thus also a powerful number.

51365889 is a `hidden beast` number, since 513 + 6 + 58 + 89 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11675889 + 39690000 = 3417^2 + 6300^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 51365889 - 2¹ = 51365887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51365887) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 20307 + ... + 22695.

Almost surely, 2^51365889 is an apocalyptic number.

51365889 is the 7167-th square number.

51365889 is the 3584-th centered octagonal number.

It is an amenable number.

51365889 is a deficient number, since it is larger than the sum of its proper divisors (22860354).

51365889 is an frugal number, since it uses more digits than its factorization.

51365889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4784 (or 2392 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The cubic root of 51365889 is about 371.7277100385.

It can be divided in two parts, 5136 and 5889, that added together give a square (11025 = 105²).

The spelling of 51365889 in words is "fifty-one million, three hundred sixty-five thousand, eight hundred eighty-nine".