55212001 has 8 divisors (see below), whose sum is σ = 59520384. Its totient is φ = 50912400.

The previous prime is 55211999. The next prime is 55212007. The reversal of 55212001 is 10021255.

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 55212001 - 2¹ = 55211999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55212007) 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, 17400 + ... + 20326.

It is an arithmetic number, because the mean of its divisors is an integer number (7440048).

Almost surely, 2^55212001 is an apocalyptic number.

It is an amenable number.

55212001 is a deficient number, since it is larger than the sum of its proper divisors (4308383).

55212001 is a wasteful number, since it uses less digits than its factorization.

55212001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4391.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 55212001 is about 7430.4778446611. The cubic root of 55212001 is about 380.7832436818.

Adding to 55212001 its reverse (10021255), we get a palindrome (65233256).

The spelling of 55212001 in words is "fifty-five million, two hundred twelve thousand, one".