145511471 has 16 divisors (see below), whose sum is σ = 169401600. Its totient is φ = 122411520.

The previous prime is 145511459. The next prime is 145511521. The reversal of 145511471 is 174115541.

It is a de Polignac number, because none of the positive numbers 2^k-145511471 is a prime.

It is a super-3 number, since 3×145511471³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145510471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210236 + ... + 210926.

It is an arithmetic number, because the mean of its divisors is an integer number (10587600).

Almost surely, 2^145511471 is an apocalyptic number.

145511471 is a deficient number, since it is larger than the sum of its proper divisors (23890129).

145511471 is an equidigital number, since it uses as much as digits as its factorization.

145511471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1214.

The product of its digits is 2800, while the sum is 29.

The square root of 145511471 is about 12062.8135606914. The cubic root of 145511471 is about 525.9757768101.

The spelling of 145511471 in words is "one hundred forty-five million, five hundred eleven thousand, four hundred seventy-one".