55143450 has 48 divisors (see below), whose sum is σ = 151954560. Its totient is φ = 14704560.

The previous prime is 55143449. The next prime is 55143463. The reversal of 55143450 is 5434155.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19074 + ... + 21773.

It is an arithmetic number, because the mean of its divisors is an integer number (3165720).

Almost surely, 2^55143450 is an apocalyptic number.

55143450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55143450 is an abundant number, since it is smaller than the sum of its proper divisors (96811110).

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

55143450 is a wasteful number, since it uses less digits than its factorization.

55143450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40868 (or 40857 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 55143450 is about 7425.8635861427. The cubic root of 55143450 is about 380.6255854295.

The spelling of 55143450 in words is "fifty-five million, one hundred forty-three thousand, four hundred fifty".