145414220 has 48 divisors (see below), whose sum is σ = 367368960. Its totient is φ = 47231424.

The previous prime is 145414219. The next prime is 145414223. The reversal of 145414220 is 22414541.

It is a super-2 number, since 2×145414220² = 42290590756416800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145414223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24674 + ... + 29993.

It is an arithmetic number, because the mean of its divisors is an integer number (7653520).

Almost surely, 2^145414220 is an apocalyptic number.

145414220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145414220 is an abundant number, since it is smaller than the sum of its proper divisors (221954740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145414220 is a wasteful number, since it uses less digits than its factorization.

145414220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54702 (or 54700 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 145414220 is about 12058.7818621949. The cubic root of 145414220 is about 525.8585739767.

Adding to 145414220 its reverse (22414541), we get a palindrome (167828761).

The spelling of 145414220 in words is "one hundred forty-five million, four hundred fourteen thousand, two hundred twenty".