55215160 has 192 divisors, whose sum is σ = 170644320. Its totient is φ = 15805440.

The previous prime is 55215119. The next prime is 55215161. The reversal of 55215160 is 6151255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55215161) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 280182 + ... + 280378.

Almost surely, 2^55215160 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55215160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85322160).

55215160 is an abundant number, since it is smaller than the sum of its proper divisors (115429160).

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

55215160 is a wasteful number, since it uses less digits than its factorization.

55215160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246 (or 235 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 55215160 is about 7430.6904120680. The cubic root of 55215160 is about 380.7905058187.

The spelling of 55215160 in words is "fifty-five million, two hundred fifteen thousand, one hundred sixty".