55199730 has 16 divisors (see below), whose sum is σ = 132479424. Its totient is φ = 14719920.

The previous prime is 55199717. The next prime is 55199743. The reversal of 55199730 is 3799155.

It is an interprime number because it is at equal distance from previous prime (55199717) and next prime (55199743).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 919966 + ... + 920025.

It is an arithmetic number, because the mean of its divisors is an integer number (8279964).

Almost surely, 2^55199730 is an apocalyptic number.

55199730 is an abundant number, since it is smaller than the sum of its proper divisors (77279694).

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

55199730 is a wasteful number, since it uses less digits than its factorization.

55199730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1840001.

The product of its (nonzero) digits is 42525, while the sum is 39.

The square root of 55199730 is about 7429.6520779913. The cubic root of 55199730 is about 380.7550315944.

The spelling of 55199730 in words is "fifty-five million, one hundred ninety-nine thousand, seven hundred thirty".