145224331 has 8 divisors (see below), whose sum is σ = 166931424. Its totient is φ = 123757440.

The previous prime is 145224329. The next prime is 145224341. The reversal of 145224331 is 133422541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145224331 - 2¹ = 145224329 is a prime.

It is a super-2 number, since 2×145224331² = 42180212628795122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145224296 and 145224305.

It is not an unprimeable number, because it can be changed into a prime (145224341) 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, 58750 + ... + 61171.

It is an arithmetic number, because the mean of its divisors is an integer number (20866428).

Almost surely, 2^145224331 is an apocalyptic number.

145224331 is a deficient number, since it is larger than the sum of its proper divisors (21707093).

145224331 is a wasteful number, since it uses less digits than its factorization.

145224331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120101.

The product of its digits is 2880, while the sum is 25.

The square root of 145224331 is about 12050.9058165766. The cubic root of 145224331 is about 525.6295769882.

Adding to 145224331 its reverse (133422541), we get a palindrome (278646872).

The spelling of 145224331 in words is "one hundred forty-five million, two hundred twenty-four thousand, three hundred thirty-one".