51154013 has 2 divisors, whose sum is σ = 51154014. Its totient is φ = 51154012.

The previous prime is 51154007. The next prime is 51154021. The reversal of 51154013 is 31045115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49815364 + 1338649 = 7058^2 + 1157^2 .

It is a cyclic number.

It is not a de Polignac number, because 51154013 - 2¹⁴ = 51137629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51154043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25577006 + 25577007.

It is an arithmetic number, because the mean of its divisors is an integer number (25577007).

Almost surely, 2^51154013 is an apocalyptic number.

It is an amenable number.

51154013 is a deficient number, since it is larger than the sum of its proper divisors (1).

51154013 is an equidigital number, since it uses as much as digits as its factorization.

51154013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 51154013 is about 7152.2033667954. The cubic root of 51154013 is about 371.2159000827.

Adding to 51154013 its reverse (31045115), we get a palindrome (82199128).

The spelling of 51154013 in words is "fifty-one million, one hundred fifty-four thousand, thirteen".