51245523 has 36 divisors (see below), whose sum is σ = 89097840. Its totient is φ = 28266336.

The previous prime is 51245521. The next prime is 51245533. The reversal of 51245523 is 32554215.

It is a happy number.

It is not a de Polignac number, because 51245523 - 2¹ = 51245521 is a prime.

It is a super-2 number, since 2×51245523² = 5252207255087058, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51245521) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 10786 + ... + 14792.

It is an arithmetic number, because the mean of its divisors is an integer number (2474940).

Almost surely, 2^51245523 is an apocalyptic number.

51245523 is a deficient number, since it is larger than the sum of its proper divisors (37852317).

51245523 is a wasteful number, since it uses less digits than its factorization.

51245523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4056 (or 4046 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 51245523 is about 7158.5978375657. The cubic root of 51245523 is about 371.4371256765.

Adding to 51245523 its reverse (32554215), we get a palindrome (83799738).

The spelling of 51245523 in words is "fifty-one million, two hundred forty-five thousand, five hundred twenty-three".