145520422999 has 32 divisors (see below), whose sum is σ = 177540480000. Its totient is φ = 118999454112.

The previous prime is 145520422979. The next prime is 145520423029. The reversal of 145520422999 is 999224025541.

It is a happy number.

It is not a de Polignac number, because 145520422999 - 2²¹ = 145518325847 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 (145520422919) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3045112 + ... + 3092530.

It is an arithmetic number, because the mean of its divisors is an integer number (5548140000).

Almost surely, 2^145520422999 is an apocalyptic number.

145520422999 is a deficient number, since it is larger than the sum of its proper divisors (32020057001).

145520422999 is an equidigital number, since it uses as much as digits as its factorization.

145520422999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47852 (or 47838 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 52.

The spelling of 145520422999 in words is "one hundred forty-five billion, five hundred twenty million, four hundred twenty-two thousand, nine hundred ninety-nine".