145549811 has 12 divisors (see below), whose sum is σ = 165505200. Its totient is φ = 127752240.

The previous prime is 145549783. The next prime is 145549813. The reversal of 145549811 is 118945541.

It is a happy number.

It is not a de Polignac number, because 145549811 - 2²² = 141355507 is a prime.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145549813) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17231 + ... + 24248.

It is an arithmetic number, because the mean of its divisors is an integer number (13792100).

Almost surely, 2^145549811 is an apocalyptic number.

145549811 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

145549811 is a deficient number, since it is larger than the sum of its proper divisors (19955389).

145549811 is a wasteful number, since it uses less digits than its factorization.

145549811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41530 (or 41519 counting only the distinct ones).

The product of its digits is 28800, while the sum is 38.

The square root of 145549811 is about 12064.4026375117. The cubic root of 145549811 is about 526.0219682209.

The spelling of 145549811 in words is "one hundred forty-five million, five hundred forty-nine thousand, eight hundred eleven".