145503331 has 2 divisors, whose sum is σ = 145503332. Its totient is φ = 145503330.

The previous prime is 145503299. The next prime is 145503343. The reversal of 145503331 is 133305541.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 145503331 - 2⁵ = 145503299 is a prime.

It is a super-2 number, since 2×145503331² = 42342438664191122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 145503296 and 145503305.

It is not a weakly prime, because it can be changed into another prime (145503031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72751665 + 72751666.

It is an arithmetic number, because the mean of its divisors is an integer number (72751666).

Almost surely, 2^145503331 is an apocalyptic number.

145503331 is a deficient number, since it is larger than the sum of its proper divisors (1).

145503331 is an equidigital number, since it uses as much as digits as its factorization.

145503331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 145503331 is about 12062.4761554168. The cubic root of 145503331 is about 525.9659688258.

Adding to 145503331 its reverse (133305541), we get a palindrome (278808872).

The spelling of 145503331 in words is "one hundred forty-five million, five hundred three thousand, three hundred thirty-one".