149018251 has 4 divisors (see below), whose sum is σ = 151242472. Its totient is φ = 146794032.

The previous prime is 149018183. The next prime is 149018267. The reversal of 149018251 is 152810941.

It is a happy number.

149018251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149018251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149018291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1112010 + ... + 1112143.

It is an arithmetic number, because the mean of its divisors is an integer number (37810618).

Almost surely, 2^149018251 is an apocalyptic number.

149018251 is a deficient number, since it is larger than the sum of its proper divisors (2224221).

149018251 is an equidigital number, since it uses as much as digits as its factorization.

149018251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2224220.

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 149018251 is about 12207.3031829311. The cubic root of 149018251 is about 530.1675642004.

The spelling of 149018251 in words is "one hundred forty-nine million, eighteen thousand, two hundred fifty-one".