53561551 has 8 divisors (see below), whose sum is σ = 56589680. Its totient is φ = 50554368.

The previous prime is 53561507. The next prime is 53561567. The reversal of 53561551 is 15516535.

53561551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 53561551 - 2⁷ = 53561423 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 (53561591) 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 7 ways as a sum of consecutive naturals, for example, 175 + ... + 10351.

It is an arithmetic number, because the mean of its divisors is an integer number (7073710).

Almost surely, 2^53561551 is an apocalyptic number.

53561551 is a deficient number, since it is larger than the sum of its proper divisors (3028129).

53561551 is a wasteful number, since it uses less digits than its factorization.

53561551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10473.

The product of its digits is 11250, while the sum is 31.

The square root of 53561551 is about 7318.5757494201. The cubic root of 53561551 is about 376.9505501680.

The spelling of 53561551 in words is "fifty-three million, five hundred sixty-one thousand, five hundred fifty-one".