51493315 has 4 divisors (see below), whose sum is σ = 61791984. Its totient is φ = 41194648.

The previous prime is 51493313. The next prime is 51493367. The reversal of 51493315 is 51339415.

It is a happy number.

51493315 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51339415 = 5 ⋅10267883.

It is a cyclic number.

It is not a de Polignac number, because 51493315 - 2¹ = 51493313 is a prime.

It is a super-2 number, since 2×51493315² = 5303122979378450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51493313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5149327 + ... + 5149336.

It is an arithmetic number, because the mean of its divisors is an integer number (15447996).

Almost surely, 2^51493315 is an apocalyptic number.

51493315 is a deficient number, since it is larger than the sum of its proper divisors (10298669).

51493315 is a wasteful number, since it uses less digits than its factorization.

51493315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10298668.

The product of its digits is 8100, while the sum is 31.

The square root of 51493315 is about 7175.8842660678. The cubic root of 51493315 is about 372.0348442137.

It can be divided in two parts, 5149 and 3315, that added together give a square (8464 = 92²).

The spelling of 51493315 in words is "fifty-one million, four hundred ninety-three thousand, three hundred fifteen".