55213000 has 32 divisors (see below), whose sum is σ = 129200760. Its totient is φ = 22084800.

The previous prime is 55212961. The next prime is 55213007. The reversal of 55213000 is 31255.

It can be written as a sum of positive squares in 4 ways, for example, as 19236996 + 35976004 = 4386^2 + 5998^2 .

It is not an unprimeable number, because it can be changed into a prime (55213007) 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, 26607 + ... + 28606.

Almost surely, 2^55213000 is an apocalyptic number.

55213000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55213000 is an abundant number, since it is smaller than the sum of its proper divisors (73987760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55213000 is a wasteful number, since it uses less digits than its factorization.

55213000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55234 (or 55220 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 16.

The square root of 55213000 is about 7430.5450674900. The cubic root of 55213000 is about 380.7855402849.

Adding to 55213000 its reverse (31255), we get a palindrome (55244255).

The spelling of 55213000 in words is "fifty-five million, two hundred thirteen thousand".