145015555 has 8 divisors (see below), whose sum is σ = 174434544. Its totient is φ = 115735200.

The previous prime is 145015547. The next prime is 145015561. The reversal of 145015555 is 555510541.

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

It is not a de Polignac number, because 145015555 - 2³ = 145015547 is a prime.

It is a super-2 number, since 2×145015555² = 42059022383916050, 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, 32341 + ... + 36550.

It is an arithmetic number, because the mean of its divisors is an integer number (21804318).

Almost surely, 2^145015555 is an apocalyptic number.

145015555 is a deficient number, since it is larger than the sum of its proper divisors (29418989).

145015555 is an equidigital number, since it uses as much as digits as its factorization.

145015555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69317.

The product of its (nonzero) digits is 12500, while the sum is 31.

The square root of 145015555 is about 12042.2404476908. The cubic root of 145015555 is about 525.3775726832.

The spelling of 145015555 in words is "one hundred forty-five million, fifteen thousand, five hundred fifty-five".