145554217 has 8 divisors (see below), whose sum is σ = 147927200. Its totient is φ = 143187264.

The previous prime is 145554203. The next prime is 145554247. The reversal of 145554217 is 712455541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145554217 - 2⁷ = 145554089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145554247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97009 + ... + 98497.

It is an arithmetic number, because the mean of its divisors is an integer number (18490900).

Almost surely, 2^145554217 is an apocalyptic number.

It is an amenable number.

145554217 is a deficient number, since it is larger than the sum of its proper divisors (2372983).

145554217 is a wasteful number, since it uses less digits than its factorization.

145554217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3015.

The product of its digits is 28000, while the sum is 34.

The square root of 145554217 is about 12064.5852394519. The cubic root of 145554217 is about 526.0272759786.

The spelling of 145554217 in words is "one hundred forty-five million, five hundred fifty-four thousand, two hundred seventeen".