145015553 has 4 divisors (see below), whose sum is σ = 145352448. Its totient is φ = 144678660.

The previous prime is 145015547. The next prime is 145015561. The reversal of 145015553 is 355510541.

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.

It is a cyclic number.

It is not a de Polignac number, because 145015553 - 2¹⁸ = 144753409 is a prime.

It is a super-2 number, since 2×145015553² = 42059021223791618, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (145015153) 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, 167801 + ... + 168662.

It is an arithmetic number, because the mean of its divisors is an integer number (36338112).

Almost surely, 2^145015553 is an apocalyptic number.

It is an amenable number.

145015553 is a deficient number, since it is larger than the sum of its proper divisors (336895).

145015553 is an equidigital number, since it uses as much as digits as its factorization.

145015553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336894.

The product of its (nonzero) digits is 7500, while the sum is 29.

The square root of 145015553 is about 12042.2403646498. The cubic root of 145015553 is about 525.3775702679.

The spelling of 145015553 in words is "one hundred forty-five million, fifteen thousand, five hundred fifty-three".