145313473 has 4 divisors (see below), whose sum is σ = 145371780. Its totient is φ = 145255168.

The previous prime is 145313449. The next prime is 145313503. The reversal of 145313473 is 374313541.

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

It can be written as a sum of positive squares in 2 ways, for example, as 122589184 + 22724289 = 11072^2 + 4767^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145313473 is a prime.

It is a super-2 number, since 2×145313473² = 42232010870643458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145313173) 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, 25240 + ... + 30457.

It is an arithmetic number, because the mean of its divisors is an integer number (36342945).

Almost surely, 2^145313473 is an apocalyptic number.

It is an amenable number.

145313473 is a deficient number, since it is larger than the sum of its proper divisors (58307).

145313473 is an equidigital number, since it uses as much as digits as its factorization.

145313473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58306.

The product of its digits is 15120, while the sum is 31.

The square root of 145313473 is about 12054.6038093336. The cubic root of 145313473 is about 525.7371027903.

The spelling of 145313473 in words is "one hundred forty-five million, three hundred thirteen thousand, four hundred seventy-three".