145225515 has 32 divisors (see below), whose sum is σ = 238807296. Its totient is φ = 75335040.

The previous prime is 145225439. The next prime is 145225541. The reversal of 145225515 is 515522541.

It is not a de Polignac number, because 145225515 - 2¹⁴ = 145209131 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82545 + ... + 84285.

It is an arithmetic number, because the mean of its divisors is an integer number (7462728).

Almost surely, 2^145225515 is an apocalyptic number.

145225515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

145225515 is a deficient number, since it is larger than the sum of its proper divisors (93581781).

145225515 is a wasteful number, since it uses less digits than its factorization.

145225515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1899.

The product of its digits is 10000, while the sum is 30.

The square root of 145225515 is about 12050.9549414144. The cubic root of 145225515 is about 525.6310054535.

The spelling of 145225515 in words is "one hundred forty-five million, two hundred twenty-five thousand, five hundred fifteen".