51019245 has 24 divisors (see below), whose sum is σ = 88774296. Its totient is φ = 27105408.

The previous prime is 51019229. The next prime is 51019289. The reversal of 51019245 is 54291015.

It can be written as a sum of positive squares in 4 ways, for example, as 509796 + 50509449 = 714^2 + 7107^2 .

It is not a de Polignac number, because 51019245 - 2⁴ = 51019229 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10419 + ... + 14511.

It is an arithmetic number, because the mean of its divisors is an integer number (3698929).

Almost surely, 2^51019245 is an apocalyptic number.

It is an amenable number.

51019245 is a deficient number, since it is larger than the sum of its proper divisors (37755051).

51019245 is a wasteful number, since it uses less digits than its factorization.

51019245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4381 (or 4378 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 51019245 is about 7142.7757209645. The cubic root of 51019245 is about 370.8896172898.

The spelling of 51019245 in words is "fifty-one million, nineteen thousand, two hundred forty-five".