53381651 has 4 divisors (see below), whose sum is σ = 53396904. Its totient is φ = 53366400.

The previous prime is 53381641. The next prime is 53381693. The reversal of 53381651 is 15618335.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 53381651 - 2¹⁰ = 53380627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53381611) 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, 536 + ... + 10346.

It is an arithmetic number, because the mean of its divisors is an integer number (13349226).

Almost surely, 2^53381651 is an apocalyptic number.

53381651 is a deficient number, since it is larger than the sum of its proper divisors (15253).

53381651 is an equidigital number, since it uses as much as digits as its factorization.

53381651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15252.

The product of its digits is 10800, while the sum is 32.

The square root of 53381651 is about 7306.2747689914. The cubic root of 53381651 is about 376.5280489054.

Adding to 53381651 its reverse (15618335), we get a palindrome (68999986).

The spelling of 53381651 in words is "fifty-three million, three hundred eighty-one thousand, six hundred fifty-one".