145737331 has 2 divisors, whose sum is σ = 145737332. Its totient is φ = 145737330.

The previous prime is 145737301. The next prime is 145737349. The reversal of 145737331 is 133737541.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 145737331 - 2⁹ = 145736819 is a prime.

It is a super-3 number, since 3×145737331³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (145737301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72868665 + 72868666.

It is an arithmetic number, because the mean of its divisors is an integer number (72868666).

Almost surely, 2^145737331 is an apocalyptic number.

145737331 is a deficient number, since it is larger than the sum of its proper divisors (1).

145737331 is an equidigital number, since it uses as much as digits as its factorization.

145737331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26460, while the sum is 34.

The square root of 145737331 is about 12072.1717598782. The cubic root of 145737331 is about 526.2477724962.

It can be divided in two parts, 14573 and 7331, that added together give a square (21904 = 148²).

The spelling of 145737331 in words is "one hundred forty-five million, seven hundred thirty-seven thousand, three hundred thirty-one".