51620153 has 4 divisors (see below), whose sum is σ = 55590948. Its totient is φ = 47649360.

The previous prime is 51620141. The next prime is 51620161. The reversal of 51620153 is 35102615.

51620153 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 27541504 + 24078649 = 5248^2 + 4907^2 .

It is a cyclic number.

It is not a de Polignac number, because 51620153 - 2⁴ = 51620137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51620953) 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, 1985378 + ... + 1985403.

It is an arithmetic number, because the mean of its divisors is an integer number (13897737).

Almost surely, 2^51620153 is an apocalyptic number.

It is an amenable number.

51620153 is a deficient number, since it is larger than the sum of its proper divisors (3970795).

51620153 is a wasteful number, since it uses less digits than its factorization.

51620153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3970794.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 51620153 is about 7184.7166262839. The cubic root of 51620153 is about 372.3400583564.

Adding to 51620153 its reverse (35102615), we get a palindrome (86722768).

The spelling of 51620153 in words is "fifty-one million, six hundred twenty thousand, one hundred fifty-three".