53415553 has 4 divisors (see below), whose sum is σ = 53447680. Its totient is φ = 53383428.

The previous prime is 53415539. The next prime is 53415601. The reversal of 53415553 is 35551435.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53415553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53415533) 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, 13425 + ... + 16942.

It is an arithmetic number, because the mean of its divisors is an integer number (13361920).

Almost surely, 2^53415553 is an apocalyptic number.

It is an amenable number.

53415553 is a deficient number, since it is larger than the sum of its proper divisors (32127).

53415553 is a wasteful number, since it uses less digits than its factorization.

53415553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32126.

The product of its digits is 22500, while the sum is 31.

The square root of 53415553 is about 7308.5944613174. The cubic root of 53415553 is about 376.6077414110.

Adding to 53415553 its reverse (35551435), we get a palindrome (88966988).

The spelling of 53415553 in words is "fifty-three million, four hundred fifteen thousand, five hundred fifty-three".