149841551 has 4 divisors (see below), whose sum is σ = 150320592. Its totient is φ = 149362512.

The previous prime is 149841493. The next prime is 149841563. The reversal of 149841551 is 155148941.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 149841551 - 2⁶ = 149841487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149841751) 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, 239051 + ... + 239676.

It is an arithmetic number, because the mean of its divisors is an integer number (37580148).

Almost surely, 2^149841551 is an apocalyptic number.

149841551 is a deficient number, since it is larger than the sum of its proper divisors (479041).

149841551 is an equidigital number, since it uses as much as digits as its factorization.

149841551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479040.

The product of its digits is 28800, while the sum is 38.

The square root of 149841551 is about 12240.9783514227. The cubic root of 149841551 is about 531.1421329140.

The spelling of 149841551 in words is "one hundred forty-nine million, eight hundred forty-one thousand, five hundred fifty-one".