145521355 has 8 divisors (see below), whose sum is σ = 199572192. Its totient is φ = 99786048.

The previous prime is 145521307. The next prime is 145521371. The reversal of 145521355 is 553125541.

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 145521355 - 2⁷ = 145521227 is a prime.

It is a super-2 number, since 2×145521355² = 42352929522072050, which contains 22 as substring.

It is a Duffinian 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, 2078842 + ... + 2078911.

It is an arithmetic number, because the mean of its divisors is an integer number (24946524).

Almost surely, 2^145521355 is an apocalyptic number.

145521355 is a deficient number, since it is larger than the sum of its proper divisors (54050837).

145521355 is an equidigital number, since it uses as much as digits as its factorization.

145521355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4157765.

The product of its digits is 15000, while the sum is 31.

The square root of 145521355 is about 12063.2232425666. The cubic root of 145521355 is about 525.9876856693.

Adding to 145521355 its reverse (553125541), we get a palindrome (698646896).

The spelling of 145521355 in words is "one hundred forty-five million, five hundred twenty-one thousand, three hundred fifty-five".