51340523 has 4 divisors (see below), whose sum is σ = 55289808. Its totient is φ = 47391240.

The previous prime is 51340519. The next prime is 51340537. The reversal of 51340523 is 32504315.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 51340523 - 2² = 51340519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51360523) 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, 1974623 + ... + 1974648.

It is an arithmetic number, because the mean of its divisors is an integer number (13822452).

Almost surely, 2^51340523 is an apocalyptic number.

51340523 is a deficient number, since it is larger than the sum of its proper divisors (3949285).

51340523 is a wasteful number, since it uses less digits than its factorization.

51340523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3949284.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 51340523 is about 7165.2301428496. The cubic root of 51340523 is about 371.6665099058. Note that the first 3 decimals are identical.

Adding to 51340523 its reverse (32504315), we get a palindrome (83844838).

The spelling of 51340523 in words is "fifty-one million, three hundred forty thousand, five hundred twenty-three".