51140393 has 2 divisors, whose sum is σ = 51140394. Its totient is φ = 51140392.

The previous prime is 51140351. The next prime is 51140399. The reversal of 51140393 is 39304115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39904489 + 11235904 = 6317^2 + 3352^2 .

It is a cyclic number.

It is not a de Polignac number, because 51140393 - 2¹⁶ = 51074857 is a prime.

It is not a weakly prime, because it can be changed into another prime (51140399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25570196 + 25570197.

It is an arithmetic number, because the mean of its divisors is an integer number (25570197).

Almost surely, 2^51140393 is an apocalyptic number.

It is an amenable number.

51140393 is a deficient number, since it is larger than the sum of its proper divisors (1).

51140393 is an equidigital number, since it uses as much as digits as its factorization.

51140393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 51140393 is about 7151.2511492745. The cubic root of 51140393 is about 371.1829511568.

It can be divided in two parts, 511 and 40393, that added together give a palindrome (40904).

The spelling of 51140393 in words is "fifty-one million, one hundred forty thousand, three hundred ninety-three".