55327820 has 24 divisors (see below), whose sum is σ = 116482128. Its totient is φ = 22075200.

The previous prime is 55327817. The next prime is 55327823. The reversal of 55327820 is 2872355.

It is an interprime number because it is at equal distance from previous prime (55327817) and next prime (55327823).

It is a super-2 number, since 2×55327820² = 6122335331904800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55327823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5135 + ... + 11705.

It is an arithmetic number, because the mean of its divisors is an integer number (4853422).

Almost surely, 2^55327820 is an apocalyptic number.

It is an amenable number.

55327820 is an abundant number, since it is smaller than the sum of its proper divisors (61154308).

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

55327820 is a wasteful number, since it uses less digits than its factorization.

55327820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7001 (or 6999 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 55327820 is about 7438.2672713475. The cubic root of 55327820 is about 381.0493158632.

The spelling of 55327820 in words is "fifty-five million, three hundred twenty-seven thousand, eight hundred twenty".