55712219 has 12 divisors (see below), whose sum is σ = 59061600. Its totient is φ = 52489584.

The previous prime is 55712197. The next prime is 55712227. The reversal of 55712219 is 91221755.

It is a happy number.

It is not a de Polignac number, because 55712219 - 2²⁴ = 38935003 is a prime.

It is a super-2 number, since 2×55712219² = 6207702691807922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55712119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53102 + ... + 54140.

It is an arithmetic number, because the mean of its divisors is an integer number (4921800).

Almost surely, 2^55712219 is an apocalyptic number.

55712219 is a deficient number, since it is larger than the sum of its proper divisors (3349381).

55712219 is a wasteful number, since it uses less digits than its factorization.

55712219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154 (or 1111 counting only the distinct ones).

The product of its digits is 6300, while the sum is 32.

The square root of 55712219 is about 7464.0618298618. The cubic root of 55712219 is about 381.9297473213.

The spelling of 55712219 in words is "fifty-five million, seven hundred twelve thousand, two hundred nineteen".