55316730 has 64 divisors (see below), whose sum is σ = 152494848. Its totient is φ = 12579840.

The previous prime is 55316719. The next prime is 55316731. The reversal of 55316730 is 3761355.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55316731) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50064 + ... + 51156.

It is an arithmetic number, because the mean of its divisors is an integer number (2382732).

Almost surely, 2^55316730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55316730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76247424).

55316730 is an abundant number, since it is smaller than the sum of its proper divisors (97178118).

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

55316730 is a wasteful number, since it uses less digits than its factorization.

55316730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351.

The product of its (nonzero) digits is 9450, while the sum is 30.

The square root of 55316730 is about 7437.5217646740. The cubic root of 55316730 is about 381.0238547763.

The spelling of 55316730 in words is "fifty-five million, three hundred sixteen thousand, seven hundred thirty".