55219210 has 16 divisors (see below), whose sum is σ = 101819592. Its totient is φ = 21548800.

The previous prime is 55219193. The next prime is 55219211. The reversal of 55219210 is 1291255.

It can be written as a sum of positive squares in 4 ways, for example, as 9778129 + 45441081 = 3127^2 + 6741^2 .

It is a super-2 number, since 2×55219210² = 6098322306048200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55219211) 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, 66931 + ... + 67750.

Almost surely, 2^55219210 is an apocalyptic number.

55219210 is a deficient number, since it is larger than the sum of its proper divisors (46600382).

55219210 is a wasteful number, since it uses less digits than its factorization.

55219210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134729.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 55219210 is about 7430.9629254895. The cubic root of 55219210 is about 380.7998158454.

The spelling of 55219210 in words is "fifty-five million, two hundred nineteen thousand, two hundred ten".