149181100 has 36 divisors (see below), whose sum is σ = 325697904. Its totient is φ = 59308480.

The previous prime is 149181091. The next prime is 149181101. The reversal of 149181100 is 1181941.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (149181101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12234 + ... + 21166.

It is an arithmetic number, because the mean of its divisors is an integer number (9047164).

Almost surely, 2^149181100 is an apocalyptic number.

149181100 is a gapful number since it is divisible by the number (10) 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 149181100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162848952).

149181100 is an abundant number, since it is smaller than the sum of its proper divisors (176516804).

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

149181100 is a wasteful number, since it uses less digits than its factorization.

149181100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9114 (or 9107 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 25.

The square root of 149181100 is about 12213.9715080722. The cubic root of 149181100 is about 530.3606184650.

The spelling of 149181100 in words is "one hundred forty-nine million, one hundred eighty-one thousand, one hundred".