151440331 has 8 divisors (see below), whose sum is σ = 176607200. Its totient is φ = 129805704.

The previous prime is 151440329. The next prime is 151440343. The reversal of 151440331 is 133044151.

151440331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 151440331 - 2¹ = 151440329 is a prime.

It is a super-2 number, since 2×151440331² = 45868347706779122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (151440391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220416 + ... + 221101.

It is an arithmetic number, because the mean of its divisors is an integer number (22075900).

Almost surely, 2^151440331 is an apocalyptic number.

151440331 is a deficient number, since it is larger than the sum of its proper divisors (25166869).

151440331 is an frugal number, since it uses more digits than its factorization.

151440331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441538 (or 441524 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 151440331 is about 12306.1094989440. The cubic root of 151440331 is about 533.0245146639.

Adding to 151440331 its reverse (133044151), we get a palindrome (284484482).

The spelling of 151440331 in words is "one hundred fifty-one million, four hundred forty thousand, three hundred thirty-one".