55236551 has 4 divisors (see below), whose sum is σ = 55284504. Its totient is φ = 55188600.

The previous prime is 55236541. The next prime is 55236569. The reversal of 55236551 is 15563255.

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 55236551 - 2⁶ = 55236487 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 (55236541) 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, 22205 + ... + 24566.

It is an arithmetic number, because the mean of its divisors is an integer number (13821126).

Almost surely, 2^55236551 is an apocalyptic number.

55236551 is a deficient number, since it is larger than the sum of its proper divisors (47953).

55236551 is a wasteful number, since it uses less digits than its factorization.

55236551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47952.

The product of its digits is 22500, while the sum is 32.

The square root of 55236551 is about 7432.1296409576. The cubic root of 55236551 is about 380.8396737045.

The spelling of 55236551 in words is "fifty-five million, two hundred thirty-six thousand, five hundred fifty-one".