55212031 has 8 divisors (see below), whose sum is σ = 63172224. Its totient is φ = 47270040.

The previous prime is 55212011. The next prime is 55212071. The reversal of 55212031 is 13021255.

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

It is a cyclic number.

It is not a de Polignac number, because 55212031 - 2⁵ = 55211999 is a prime.

It is a super-2 number, since 2×55212031² = 6096736734289922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55212011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2736 + ... + 10858.

It is an arithmetic number, because the mean of its divisors is an integer number (7896528).

Almost surely, 2^55212031 is an apocalyptic number.

55212031 is a deficient number, since it is larger than the sum of its proper divisors (7960193).

55212031 is an equidigital number, since it uses as much as digits as its factorization.

55212031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9101.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 55212031 is about 7430.4798633736. The cubic root of 55212031 is about 380.7833126492.

Adding to 55212031 its reverse (13021255), we get a palindrome (68233286).

The spelling of 55212031 in words is "fifty-five million, two hundred twelve thousand, thirty-one".