145320511 has 4 divisors (see below), whose sum is σ = 166080592. Its totient is φ = 124560432.

The previous prime is 145320503. The next prime is 145320547. The reversal of 145320511 is 115023541.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 115023541 = 29 ⋅3966329.

It is a cyclic number.

It is not a de Polignac number, because 145320511 - 2³ = 145320503 is a prime.

It is a super-2 number, since 2×145320511² = 42236101834602242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145320211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10380030 + ... + 10380043.

It is an arithmetic number, because the mean of its divisors is an integer number (41520148).

Almost surely, 2^145320511 is an apocalyptic number.

145320511 is a deficient number, since it is larger than the sum of its proper divisors (20760081).

145320511 is an equidigital number, since it uses as much as digits as its factorization.

145320511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20760080.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 145320511 is about 12054.8957274628. The cubic root of 145320511 is about 525.7455903675.

The spelling of 145320511 in words is "one hundred forty-five million, three hundred twenty thousand, five hundred eleven".