55531523 has 4 divisors (see below), whose sum is σ = 56070768. Its totient is φ = 54992280.

The previous prime is 55531513. The next prime is 55531529. The reversal of 55531523 is 32513555.

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 55531523 - 2¹⁰ = 55530499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55531529) 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, 269468 + ... + 269673.

It is an arithmetic number, because the mean of its divisors is an integer number (14017692).

Almost surely, 2^55531523 is an apocalyptic number.

55531523 is a deficient number, since it is larger than the sum of its proper divisors (539245).

55531523 is a wasteful number, since it uses less digits than its factorization.

55531523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539244.

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

The square root of 55531523 is about 7451.9475977760. The cubic root of 55531523 is about 381.5163854315.

The spelling of 55531523 in words is "fifty-five million, five hundred thirty-one thousand, five hundred twenty-three".