51172153 has 4 divisors (see below), whose sum is σ = 52936740. Its totient is φ = 49407568.

The previous prime is 51172133. The next prime is 51172249. The reversal of 51172153 is 35127115.

51172153 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 37124649 + 14047504 = 6093^2 + 3748^2 .

It is a cyclic number.

It is not a de Polignac number, because 51172153 - 2¹³ = 51163961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51172133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 882250 + ... + 882307.

It is an arithmetic number, because the mean of its divisors is an integer number (13234185).

Almost surely, 2^51172153 is an apocalyptic number.

It is an amenable number.

51172153 is a deficient number, since it is larger than the sum of its proper divisors (1764587).

51172153 is a wasteful number, since it uses less digits than its factorization.

51172153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1764586.

The product of its digits is 1050, while the sum is 25.

The square root of 51172153 is about 7153.4713950641. The cubic root of 51172153 is about 371.2597745200.

Adding to 51172153 its reverse (35127115), we get a palindrome (86299268).

The spelling of 51172153 in words is "fifty-one million, one hundred seventy-two thousand, one hundred fifty-three".