55217070 has 24 divisors (see below), whose sum is σ = 143564616. Its totient is φ = 14724528.

The previous prime is 55217053. The next prime is 55217083. The reversal of 55217070 is 7071255.

55217070 is a `hidden beast` number, since 5 + 521 + 70 + 70 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 306672 + ... + 306851.

It is an arithmetic number, because the mean of its divisors is an integer number (5981859).

Almost surely, 2^55217070 is an apocalyptic number.

55217070 is an abundant number, since it is smaller than the sum of its proper divisors (88347546).

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

55217070 is a wasteful number, since it uses less digits than its factorization.

55217070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613536 (or 613533 counting only the distinct ones).

The product of its (nonzero) digits is 2450, while the sum is 27.

The square root of 55217070 is about 7430.8189319886. The cubic root of 55217070 is about 380.7948965299.

The spelling of 55217070 in words is "fifty-five million, two hundred seventeen thousand, seventy".