145222580 has 24 divisors (see below), whose sum is σ = 308115528. Its totient is φ = 57489408.

The previous prime is 145222577. The next prime is 145222661. The reversal of 145222580 is 85222541.

It can be written as a sum of positive squares in 4 ways, for example, as 309136 + 144913444 = 556^2 + 12038^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35489 + ... + 39368.

It is an arithmetic number, because the mean of its divisors is an integer number (12838147).

Almost surely, 2^145222580 is an apocalyptic number.

145222580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145222580 is an abundant number, since it is smaller than the sum of its proper divisors (162892948).

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

145222580 is a wasteful number, since it uses less digits than its factorization.

145222580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74963 (or 74961 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 145222580 is about 12050.8331662172. The cubic root of 145222580 is about 525.6274644380.

The spelling of 145222580 in words is "one hundred forty-five million, two hundred twenty-two thousand, five hundred eighty".