53443203551 has 8 divisors (see below), whose sum is σ = 54323700144. Its totient is φ = 52562848320.

The previous prime is 53443203547. The next prime is 53443203563. The reversal of 53443203551 is 15530234435.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53443203551 - 2² = 53443203547 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 (53443203251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 952196 + ... + 1006758.

It is an arithmetic number, because the mean of its divisors is an integer number (6790462518).

Almost surely, 2^53443203551 is an apocalyptic number.

53443203551 is a deficient number, since it is larger than the sum of its proper divisors (880496593).

53443203551 is a wasteful number, since it uses less digits than its factorization.

53443203551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70681.

The product of its (nonzero) digits is 108000, while the sum is 35.

Adding to 53443203551 its reverse (15530234435), we get a palindrome (68973437986).

The spelling of 53443203551 in words is "fifty-three billion, four hundred forty-three million, two hundred three thousand, five hundred fifty-one".