145225511 has 4 divisors (see below), whose sum is σ = 145249632. Its totient is φ = 145201392.

The previous prime is 145225439. The next prime is 145225541. The reversal of 145225511 is 115522541.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 115522541 = 599 ⋅192859.

It is a cyclic number.

It is not a de Polignac number, because 145225511 - 2¹⁰ = 145224487 is a prime.

It is a super-2 number, since 2×145225511² = 42180898090422242, 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 (145225541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5330 + ... + 17856.

It is an arithmetic number, because the mean of its divisors is an integer number (36312408).

Almost surely, 2^145225511 is an apocalyptic number.

145225511 is a deficient number, since it is larger than the sum of its proper divisors (24121).

145225511 is a wasteful number, since it uses less digits than its factorization.

145225511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24120.

The product of its digits is 2000, while the sum is 26.

The square root of 145225511 is about 12050.9547754524. The cubic root of 145225511 is about 525.6310006276.

The spelling of 145225511 in words is "one hundred forty-five million, two hundred twenty-five thousand, five hundred eleven".