55303380 has 288 divisors, whose sum is σ = 203793408. Its totient is φ = 11980800.

The previous prime is 55303379. The next prime is 55303427. The reversal of 55303380 is 8330355.

55303380 = 23² + 24² + ... + 549².

55303380 is a `hidden beast` number, since 553 + 0 + 33 + 80 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1043434 + ... + 1043486.

It is an arithmetic number, because the mean of its divisors is an integer number (707616).

Almost surely, 2^55303380 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 55303380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101896704).

55303380 is an abundant number, since it is smaller than the sum of its proper divisors (148490028).

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

55303380 is a wasteful number, since it uses less digits than its factorization.

55303380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 55303380 is about 7436.6242341536. The cubic root of 55303380 is about 380.9932005317.

The spelling of 55303380 in words is "fifty-five million, three hundred three thousand, three hundred eighty".