53523551 has 4 divisors (see below), whose sum is σ = 56340600. Its totient is φ = 50706504.

The previous prime is 53523541. The next prime is 53523557. The reversal of 53523551 is 15532535.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 53523551 - 2¹⁸ = 53261407 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 (53523557) 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, 1408496 + ... + 1408533.

It is an arithmetic number, because the mean of its divisors is an integer number (14085150).

Almost surely, 2^53523551 is an apocalyptic number.

53523551 is a deficient number, since it is larger than the sum of its proper divisors (2817049).

53523551 is a wasteful number, since it uses less digits than its factorization.

53523551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2817048.

The product of its digits is 11250, while the sum is 29.

The square root of 53523551 is about 7315.9791552464. The cubic root of 53523551 is about 376.8613847782.

The spelling of 53523551 in words is "fifty-three million, five hundred twenty-three thousand, five hundred fifty-one".