149431151 has 4 divisors (see below), whose sum is σ = 151880904. Its totient is φ = 146981400.

The previous prime is 149431147. The next prime is 149431193. The reversal of 149431151 is 151134941.

149431151 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 not a de Polignac number, because 149431151 - 2² = 149431147 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 (149431141) 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, 1224785 + ... + 1224906.

It is an arithmetic number, because the mean of its divisors is an integer number (37970226).

Almost surely, 2^149431151 is an apocalyptic number.

149431151 is a deficient number, since it is larger than the sum of its proper divisors (2449753).

149431151 is an equidigital number, since it uses as much as digits as its factorization.

149431151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2449752.

The product of its digits is 2160, while the sum is 29.

The square root of 149431151 is about 12224.2034914345. The cubic root of 149431151 is about 530.6567756774.

The spelling of 149431151 in words is "one hundred forty-nine million, four hundred thirty-one thousand, one hundred fifty-one".