55261530 has 96 divisors (see below), whose sum is σ = 153653760. Its totient is φ = 13749120.

The previous prime is 55261529. The next prime is 55261607. The reversal of 55261530 is 3516255.

55261530 is a `hidden beast` number, since 552 + 61 + 53 + 0 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 55261494 and 55261503.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 80569 + ... + 81251.

It is an arithmetic number, because the mean of its divisors is an integer number (1600560).

Almost surely, 2^55261530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55261530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76826880).

55261530 is an abundant number, since it is smaller than the sum of its proper divisors (98392230).

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

55261530 is a wasteful number, since it uses less digits than its factorization.

55261530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756 (or 753 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 55261530 is about 7433.8099249308. The cubic root of 55261530 is about 380.8970726575.

Adding to 55261530 its reverse (3516255), we get a palindrome (58777785).

It can be divided in two parts, 5526 and 1530, that added together give a square (7056 = 84²).

The spelling of 55261530 in words is "fifty-five million, two hundred sixty-one thousand, five hundred thirty".