51353553 has 4 divisors (see below), whose sum is σ = 68471408. Its totient is φ = 34235700.

The previous prime is 51353543. The next prime is 51353569. The reversal of 51353553 is 35535315.

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 not a de Polignac number, because 51353553 - 2⁴ = 51353537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51353553.

It is not an unprimeable number, because it can be changed into a prime (51353513) 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, 8558923 + ... + 8558928.

It is an arithmetic number, because the mean of its divisors is an integer number (17117852).

Almost surely, 2^51353553 is an apocalyptic number.

It is an amenable number.

51353553 is a deficient number, since it is larger than the sum of its proper divisors (17117855).

51353553 is a wasteful number, since it uses less digits than its factorization.

51353553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17117854.

The product of its digits is 16875, while the sum is 30.

The square root of 51353553 is about 7166.1393371885. The cubic root of 51353553 is about 371.6979496907.

Adding to 51353553 its reverse (35535315), we get a palindrome (86888868).

The spelling of 51353553 in words is "fifty-one million, three hundred fifty-three thousand, five hundred fifty-three".