55212275 has 6 divisors (see below), whose sum is σ = 68463252. Its totient is φ = 44169800.

The previous prime is 55212257. The next prime is 55212293. The reversal of 55212275 is 57221255.

It is an interprime number because it is at equal distance from previous prime (55212257) and next prime (55212293).

It is not a de Polignac number, because 55212275 - 2¹⁸ = 54950131 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1104221 + ... + 1104270.

It is an arithmetic number, because the mean of its divisors is an integer number (11410542).

Almost surely, 2^55212275 is an apocalyptic number.

55212275 is a deficient number, since it is larger than the sum of its proper divisors (13250977).

55212275 is a wasteful number, since it uses less digits than its factorization.

55212275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2208501 (or 2208496 counting only the distinct ones).

The product of its digits is 7000, while the sum is 29.

The square root of 55212275 is about 7430.4962822143. The cubic root of 55212275 is about 380.7838735837.

The spelling of 55212275 in words is "fifty-five million, two hundred twelve thousand, two hundred seventy-five".