1005422155 has 4 divisors (see below), whose sum is σ = 1206506592. Its totient is φ = 804337720.

The previous prime is 1005422147. The next prime is 1005422189. The reversal of 1005422155 is 5512245001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5512245001 = 63067 ⋅87403.

It is not a de Polignac number, because 1005422155 - 2³ = 1005422147 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100542211 + ... + 100542220.

It is an arithmetic number, because the mean of its divisors is an integer number (301626648).

Almost surely, 2^1005422155 is an apocalyptic number.

1005422155 is a deficient number, since it is larger than the sum of its proper divisors (201084437).

1005422155 is an equidigital number, since it uses as much as digits as its factorization.

1005422155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201084436.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 1005422155 is about 31708.3925010398. The cubic root of 1005422155 is about 1001.8041281642.

Adding to 1005422155 its reverse (5512245001), we get a palindrome (6517667156).

The spelling of 1005422155 in words is "one billion, five million, four hundred twenty-two thousand, one hundred fifty-five".