145034550521 has 4 divisors (see below), whose sum is σ = 165753772032. Its totient is φ = 124315329012.

The previous prime is 145034550511. The next prime is 145034550541. The reversal of 145034550521 is 125055430541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 125055430541 = 431 ⋅290151811.

It is not a de Polignac number, because 145034550521 - 2⁶ = 145034550457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145034550511) 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, 10359610745 + ... + 10359610758.

It is an arithmetic number, because the mean of its divisors is an integer number (41438443008).

Almost surely, 2^145034550521 is an apocalyptic number.

It is an amenable number.

145034550521 is a deficient number, since it is larger than the sum of its proper divisors (20719221511).

145034550521 is an equidigital number, since it uses as much as digits as its factorization.

145034550521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20719221510.

The product of its (nonzero) digits is 60000, while the sum is 35.

The spelling of 145034550521 in words is "one hundred forty-five billion, thirty-four million, five hundred fifty thousand, five hundred twenty-one".