1005501155 has 16 divisors (see below), whose sum is σ = 1220716224. Its totient is φ = 795047040.

The previous prime is 1005501139. The next prime is 1005501169. The reversal of 1005501155 is 5511055001.

It is a happy number.

It is not a de Polignac number, because 1005501155 - 2⁴ = 1005501139 is a prime.

It is a super-2 number, since 2×1005501155² = 2022065145412668050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1005501155.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147809 + ... + 154461.

It is an arithmetic number, because the mean of its divisors is an integer number (76294764).

Almost surely, 2^1005501155 is an apocalyptic number.

1005501155 is a deficient number, since it is larger than the sum of its proper divisors (215215069).

1005501155 is a wasteful number, since it uses less digits than its factorization.

1005501155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7006.

The product of its (nonzero) digits is 625, while the sum is 23.

The square root of 1005501155 is about 31709.6382035494. The cubic root of 1005501155 is about 1001.8303660494.

Adding to 1005501155 its reverse (5511055001), we get a palindrome (6516556156).

The spelling of 1005501155 in words is "one billion, five million, five hundred one thousand, one hundred fifty-five".