55149000 has 128 divisors (see below), whose sum is σ = 177914880. Its totient is φ = 14208000.

The previous prime is 55148993. The next prime is 55149007. The reversal of 55149000 is 94155.

It is an interprime number because it is at equal distance from previous prime (55148993) and next prime (55149007).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (55149007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 92704 + ... + 93296.

It is an arithmetic number, because the mean of its divisors is an integer number (1389960).

Almost surely, 2^55149000 is an apocalyptic number.

55149000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55149000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88957440).

55149000 is an abundant number, since it is smaller than the sum of its proper divisors (122765880).

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

55149000 is a wasteful number, since it uses less digits than its factorization.

55149000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648 (or 634 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 55149000 is about 7426.2372706506. The cubic root of 55149000 is about 380.6383545564.

The spelling of 55149000 in words is "fifty-five million, one hundred forty-nine thousand".