51150613 has 4 divisors (see below), whose sum is σ = 52533100. Its totient is φ = 49768128.

The previous prime is 51150599. The next prime is 51150623. The reversal of 51150613 is 31605115.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31605115 = 5 ⋅6321023.

It can be written as a sum of positive squares in 2 ways, for example, as 47238129 + 3912484 = 6873^2 + 1978^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51150613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51150623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 691188 + ... + 691261.

It is an arithmetic number, because the mean of its divisors is an integer number (13133275).

Almost surely, 2^51150613 is an apocalyptic number.

It is an amenable number.

51150613 is a deficient number, since it is larger than the sum of its proper divisors (1382487).

51150613 is a wasteful number, since it uses less digits than its factorization.

51150613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1382486.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 51150613 is about 7151.9656738550. The cubic root of 51150613 is about 371.2076754948.

Adding to 51150613 its reverse (31605115), we get a palindrome (82755728).

The spelling of 51150613 in words is "fifty-one million, one hundred fifty thousand, six hundred thirteen".