55161580 has 12 divisors (see below), whose sum is σ = 115839360. Its totient is φ = 22064624.

The previous prime is 55161571. The next prime is 55161581. The reversal of 55161580 is 8516155.

It is not an unprimeable number, because it can be changed into a prime (55161581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1379020 + ... + 1379059.

It is an arithmetic number, because the mean of its divisors is an integer number (9653280).

Almost surely, 2^55161580 is an apocalyptic number.

It is an amenable number.

55161580 is an abundant number, since it is smaller than the sum of its proper divisors (60677780).

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

55161580 is a wasteful number, since it uses less digits than its factorization.

55161580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2758088 (or 2758086 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 31.

The square root of 55161580 is about 7427.0842192613. The cubic root of 55161580 is about 380.6672947393.

The spelling of 55161580 in words is "fifty-five million, one hundred sixty-one thousand, five hundred eighty".