55020570 has 64 divisors (see below), whose sum is σ = 145224576. Its totient is φ = 13230080.

The previous prime is 55020557. The next prime is 55020583. The reversal of 55020570 is 7502055.

It is an interprime number because it is at equal distance from previous prime (55020557) and next prime (55020583).

It is a self number, because there is not a number n which added to its sum of digits gives 55020570.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44602 + ... + 45818.

It is an arithmetic number, because the mean of its divisors is an integer number (2269134).

Almost surely, 2^55020570 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55020570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72612288).

55020570 is an abundant number, since it is smaller than the sum of its proper divisors (90204006).

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

55020570 is a wasteful number, since it uses less digits than its factorization.

55020570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375.

The product of its (nonzero) digits is 1750, while the sum is 24.

The square root of 55020570 is about 7417.5851865685. The cubic root of 55020570 is about 380.3426503076.

The spelling of 55020570 in words is "fifty-five million, twenty thousand, five hundred seventy".