55233331 has 4 divisors (see below), whose sum is σ = 55636632. Its totient is φ = 54830032.

The previous prime is 55233329. The next prime is 55233359. The reversal of 55233331 is 13333255.

It is a happy number.

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 55233331 - 2¹ = 55233329 is a prime.

It is a super-2 number, since 2×55233331² = 6101441706711122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55233296 and 55233305.

It is not an unprimeable number, because it can be changed into a prime (55233301) 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, 201445 + ... + 201718.

It is an arithmetic number, because the mean of its divisors is an integer number (13909158).

Almost surely, 2^55233331 is an apocalyptic number.

55233331 is a deficient number, since it is larger than the sum of its proper divisors (403301).

55233331 is a wasteful number, since it uses less digits than its factorization.

55233331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403300.

The product of its digits is 4050, while the sum is 25.

The square root of 55233331 is about 7431.9130107934. The cubic root of 55233331 is about 380.8322732450.

Adding to 55233331 its reverse (13333255), we get a palindrome (68566586).

The spelling of 55233331 in words is "fifty-five million, two hundred thirty-three thousand, three hundred thirty-one".