55207386 has 32 divisors (see below), whose sum is σ = 132121920. Its totient is φ = 16986672.

The previous prime is 55207363. The next prime is 55207403. The reversal of 55207386 is 68370255.

It is a self number, because there is not a number n which added to its sum of digits gives 55207386.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38620 + ... + 40023.

It is an arithmetic number, because the mean of its divisors is an integer number (4128810).

Almost surely, 2^55207386 is an apocalyptic number.

55207386 is an abundant number, since it is smaller than the sum of its proper divisors (76914534).

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

55207386 is a wasteful number, since it uses less digits than its factorization.

55207386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78667 (or 78661 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 55207386 is about 7430.1672928676. The cubic root of 55207386 is about 380.7726338892.

The spelling of 55207386 in words is "fifty-five million, two hundred seven thousand, three hundred eighty-six".