145105331 has 16 divisors (see below), whose sum is σ = 169150464. Its totient is φ = 121913664.

The previous prime is 145105291. The next prime is 145105339. The reversal of 145105331 is 133501541.

It is a cyclic number.

It is not a de Polignac number, because 145105331 - 2²⁶ = 77996467 is a prime.

It is a super-2 number, since 2×145105331² = 42111114169239122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 145105297 and 145105306.

It is not an unprimeable number, because it can be changed into a prime (145105339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78686 + ... + 80508.

It is an arithmetic number, because the mean of its divisors is an integer number (10571904).

Almost surely, 2^145105331 is an apocalyptic number.

145105331 is a deficient number, since it is larger than the sum of its proper divisors (24045133).

145105331 is a wasteful number, since it uses less digits than its factorization.

145105331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2050.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 145105331 is about 12045.9674165257. The cubic root of 145105331 is about 525.4859669565.

Adding to 145105331 its reverse (133501541), we get a palindrome (278606872).

The spelling of 145105331 in words is "one hundred forty-five million, one hundred five thousand, three hundred thirty-one".