55069950 has 96 divisors (see below), whose sum is σ = 151990272. Its totient is φ = 13104000.

The previous prime is 55069939. The next prime is 55069957. The reversal of 55069950 is 5996055.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 55069899 and 55069908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55069957) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 59995 + ... + 60905.

It is an arithmetic number, because the mean of its divisors is an integer number (1583232).

Almost surely, 2^55069950 is an apocalyptic number.

55069950 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 55069950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75995136).

55069950 is an abundant number, since it is smaller than the sum of its proper divisors (96920322).

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

55069950 is a wasteful number, since it uses less digits than its factorization.

55069950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970 (or 965 counting only the distinct ones).

The product of its (nonzero) digits is 60750, while the sum is 39.

The square root of 55069950 is about 7420.9130166038. The cubic root of 55069950 is about 380.4563999121.

It can be divided in two parts, 550 and 69950, that added together give a triangular number (70500 = T₃₇₅).

The spelling of 55069950 in words is "fifty-five million, sixty-nine thousand, nine hundred fifty".