1057171215 has 32 divisors (see below), whose sum is σ = 1740150720. Its totient is φ = 547651584.

The previous prime is 1057171189. The next prime is 1057171223. The reversal of 1057171215 is 5121717501.

It is not a de Polignac number, because 1057171215 - 2⁹ = 1057170703 is a prime.

It is a super-2 number, since 2×1057171215² = 2235221955649152450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 425557 + ... + 428033.

It is an arithmetic number, because the mean of its divisors is an integer number (54379710).

Almost surely, 2^1057171215 is an apocalyptic number.

1057171215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1057171215 is a deficient number, since it is larger than the sum of its proper divisors (682979505).

1057171215 is a wasteful number, since it uses less digits than its factorization.

1057171215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3291.

The product of its (nonzero) digits is 2450, while the sum is 30.

The square root of 1057171215 is about 32514.1694496415. The cubic root of 1057171215 is about 1018.7050126796.

Adding to 1057171215 its reverse (5121717501), we get a palindrome (6178888716).

The spelling of 1057171215 in words is "one billion, fifty-seven million, one hundred seventy-one thousand, two hundred fifteen".