145505553 has 8 divisors (see below), whose sum is σ = 204218400. Its totient is φ = 91898208.

The previous prime is 145505543. The next prime is 145505609. The reversal of 145505553 is 355505541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 145505553 - 2⁶ = 145505489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145505513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1276308 + ... + 1276421.

It is an arithmetic number, because the mean of its divisors is an integer number (25527300).

Almost surely, 2^145505553 is an apocalyptic number.

It is an amenable number.

145505553 is a deficient number, since it is larger than the sum of its proper divisors (58712847).

145505553 is a wasteful number, since it uses less digits than its factorization.

145505553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2552751.

The product of its (nonzero) digits is 37500, while the sum is 33.

The square root of 145505553 is about 12062.5682588742. The cubic root of 145505553 is about 525.9686461767.

The spelling of 145505553 in words is "one hundred forty-five million, five hundred five thousand, five hundred fifty-three".