51240053 has 4 divisors (see below), whose sum is σ = 51719040. Its totient is φ = 50761068.

The previous prime is 51240019. The next prime is 51240073. The reversal of 51240053 is 35004215.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51240053 - 2¹⁸ = 50977909 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 (51240073) 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, 239333 + ... + 239546.

It is an arithmetic number, because the mean of its divisors is an integer number (12929760).

Almost surely, 2^51240053 is an apocalyptic number.

It is an amenable number.

51240053 is a deficient number, since it is larger than the sum of its proper divisors (478987).

51240053 is a wasteful number, since it uses less digits than its factorization.

51240053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478986.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 51240053 is about 7158.2157693101. The cubic root of 51240053 is about 371.4239093455.

Adding to 51240053 its reverse (35004215), we get a palindrome (86244268).

The spelling of 51240053 in words is "fifty-one million, two hundred forty thousand, fifty-three".