145621224 has 48 divisors (see below), whose sum is σ = 450733920. Its totient is φ = 41605920.

The previous prime is 145621183. The next prime is 145621237. The reversal of 145621224 is 422126541.

145621224 is a `hidden beast` number, since 14 + 5 + 621 + 2 + 24 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 143962 + ... + 144969.

It is an arithmetic number, because the mean of its divisors is an integer number (9390290).

Almost surely, 2^145621224 is an apocalyptic number.

145621224 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

145621224 is an abundant number, since it is smaller than the sum of its proper divisors (305112696).

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

145621224 is a wasteful number, since it uses less digits than its factorization.

145621224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288950 (or 288943 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 145621224 is about 12067.3619320877. The cubic root of 145621224 is about 526.1079838252.

Adding to 145621224 its reverse (422126541), we get a palindrome (567747765).

The spelling of 145621224 in words is "one hundred forty-five million, six hundred twenty-one thousand, two hundred twenty-four".