55199340 has 192 divisors, whose sum is σ = 208051200. Its totient is φ = 11860992.

The previous prime is 55199329. The next prime is 55199381. The reversal of 55199340 is 4399155.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 55199295 and 55199304.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 63831 + ... + 64689.

It is an arithmetic number, because the mean of its divisors is an integer number (1083600).

Almost surely, 2^55199340 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 55199340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104025600).

55199340 is an abundant number, since it is smaller than the sum of its proper divisors (152851860).

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

55199340 is a wasteful number, since it uses less digits than its factorization.

55199340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901 (or 893 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 55199340 is about 7429.6258317630. The cubic root of 55199340 is about 380.7541348822.

The spelling of 55199340 in words is "fifty-five million, one hundred ninety-nine thousand, three hundred forty".