145043551 has 4 divisors (see below), whose sum is σ = 148129632. Its totient is φ = 141957472.

The previous prime is 145043533. The next prime is 145043597. The reversal of 145043551 is 155340541.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145043551 - 2⁹ = 145043039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145043501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1542970 + ... + 1543063.

It is an arithmetic number, because the mean of its divisors is an integer number (37032408).

Almost surely, 2^145043551 is an apocalyptic number.

145043551 is a deficient number, since it is larger than the sum of its proper divisors (3086081).

145043551 is an equidigital number, since it uses as much as digits as its factorization.

145043551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3086080.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 145043551 is about 12043.4027998735. The cubic root of 145043551 is about 525.4113794568.

The spelling of 145043551 in words is "one hundred forty-five million, forty-three thousand, five hundred fifty-one".