145522791 has 16 divisors (see below), whose sum is σ = 217240320. Its totient is φ = 96272280.

The previous prime is 145522757. The next prime is 145522831. The reversal of 145522791 is 197225541.

145522791 is a `hidden beast` number, since 1 + 45 + 522 + 7 + 91 = 666.

It is not a de Polignac number, because 145522791 - 2¹⁰ = 145521767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145522721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17035 + ... + 24108.

It is an arithmetic number, because the mean of its divisors is an integer number (13577520).

Almost surely, 2^145522791 is an apocalyptic number.

145522791 is a deficient number, since it is larger than the sum of its proper divisors (71717529).

145522791 is a wasteful number, since it uses less digits than its factorization.

145522791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41283 (or 41277 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 145522791 is about 12063.2827621672. The cubic root of 145522791 is about 525.9894158067.

The spelling of 145522791 in words is "one hundred forty-five million, five hundred twenty-two thousand, seven hundred ninety-one".