55550530 has 32 divisors (see below), whose sum is σ = 114618240. Its totient is φ = 18988800.

The previous prime is 55550527. The next prime is 55550557. The reversal of 55550530 is 3505555.

It is a super-2 number, since 2×55550530² = 6171722766561800, which contains 22 as substring.

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, 27081 + ... + 29059.

It is an arithmetic number, because the mean of its divisors is an integer number (3581820).

Almost surely, 2^55550530 is an apocalyptic number.

55550530 is an abundant number, since it is smaller than the sum of its proper divisors (59067710).

55550530 is a wasteful number, since it uses less digits than its factorization.

55550530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2394.

The product of its (nonzero) digits is 9375, while the sum is 28.

The square root of 55550530 is about 7453.2227928595. Note that the first 3 decimals coincide. The cubic root of 55550530 is about 381.5599081875.

The spelling of 55550530 in words is "fifty-five million, five hundred fifty thousand, five hundred thirty".