55212250 has 32 divisors (see below), whose sum is σ = 103867920. Its totient is φ = 21976000.

The previous prime is 55212239. The next prime is 55212253. The reversal of 55212250 is 5221255.

It can be written as a sum of positive squares in 8 ways, for example, as 2199289 + 53012961 = 1483^2 + 7281^2 .

It is not an unprimeable number, because it can be changed into a prime (55212253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66840 + ... + 67660.

Almost surely, 2^55212250 is an apocalyptic number.

55212250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55212250 is a deficient number, since it is larger than the sum of its proper divisors (48655670).

55212250 is a wasteful number, since it uses less digits than its factorization.

55212250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107 (or 1097 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 55212250 is about 7430.4945999577. The cubic root of 55212250 is about 380.7838161110.

The spelling of 55212250 in words is "fifty-five million, two hundred twelve thousand, two hundred fifty".