55235231 has 8 divisors (see below), whose sum is σ = 56785824. Its totient is φ = 53706240.

The previous prime is 55235209. The next prime is 55235251. The reversal of 55235231 is 13253255.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55235231 is a prime.

It is a super-2 number, since 2×55235231² = 6101861487246722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55235231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55235251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146 + ... + 10511.

It is an arithmetic number, because the mean of its divisors is an integer number (7098228).

Almost surely, 2^55235231 is an apocalyptic number.

55235231 is a deficient number, since it is larger than the sum of its proper divisors (1550593).

55235231 is a wasteful number, since it uses less digits than its factorization.

55235231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10801.

The product of its digits is 4500, while the sum is 26.

The square root of 55235231 is about 7432.0408368092. The cubic root of 55235231 is about 380.8366400105.

Adding to 55235231 its reverse (13253255), we get a palindrome (68488486).

The spelling of 55235231 in words is "fifty-five million, two hundred thirty-five thousand, two hundred thirty-one".