51498365 has 4 divisors (see below), whose sum is σ = 61798044. Its totient is φ = 41198688.

The previous prime is 51498353. The next prime is 51498371. The reversal of 51498365 is 56389415.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56389415 = 5 ⋅11277883.

It can be written as a sum of positive squares in 2 ways, for example, as 27478564 + 24019801 = 5242^2 + 4901^2 .

It is a cyclic number.

It is not a de Polignac number, because 51498365 - 2¹⁸ = 51236221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5149832 + ... + 5149841.

It is an arithmetic number, because the mean of its divisors is an integer number (15449511).

Almost surely, 2^51498365 is an apocalyptic number.

It is an amenable number.

51498365 is a deficient number, since it is larger than the sum of its proper divisors (10299679).

51498365 is a wasteful number, since it uses less digits than its factorization.

51498365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10299678.

The product of its digits is 129600, while the sum is 41.

The square root of 51498365 is about 7176.2361304517. The cubic root of 51498365 is about 372.0470057570.

The spelling of 51498365 in words is "fifty-one million, four hundred ninety-eight thousand, three hundred sixty-five".