145501819 has 2 divisors, whose sum is σ = 145501820. Its totient is φ = 145501818.

The previous prime is 145501813. The next prime is 145501891. The reversal of 145501819 is 918105541.

Together with next prime (145501891) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145501819 is a prime.

It is a super-2 number, since 2×145501819² = 42341558664617522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145501813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72750909 + 72750910.

It is an arithmetic number, because the mean of its divisors is an integer number (72750910).

Almost surely, 2^145501819 is an apocalyptic number.

145501819 is a deficient number, since it is larger than the sum of its proper divisors (1).

145501819 is an equidigital number, since it uses as much as digits as its factorization.

145501819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 34.

The square root of 145501819 is about 12062.4134815550. The cubic root of 145501819 is about 525.9641469584.

It can be divided in two parts, 14550 and 1819, that multiplied together give a triangular number (26466450 = T₇₂₇₅).

The spelling of 145501819 in words is "one hundred forty-five million, five hundred one thousand, eight hundred nineteen".