145856515 has 64 divisors (see below), whose sum is σ = 223948800. Its totient is φ = 88897536.

The previous prime is 145856509. The next prime is 145856533. The reversal of 145856515 is 515658541.

It is not a de Polignac number, because 145856515 - 2¹⁷ = 145725443 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1363092 + ... + 1363198.

It is an arithmetic number, because the mean of its divisors is an integer number (3499200).

Almost surely, 2^145856515 is an apocalyptic number.

145856515 is a deficient number, since it is larger than the sum of its proper divisors (78092285).

145856515 is a wasteful number, since it uses less digits than its factorization.

145856515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244.

The product of its digits is 120000, while the sum is 40.

The square root of 145856515 is about 12077.1070625378. The cubic root of 145856515 is about 526.3911885637.

The spelling of 145856515 in words is "one hundred forty-five million, eight hundred fifty-six thousand, five hundred fifteen".