1056512220 has 24 divisors (see below), whose sum is σ = 2958234384. Its totient is φ = 281736576.

The previous prime is 1056512207. The next prime is 1056512221. The reversal of 1056512220 is 222156501.

It is a happy number.

It is a super-2 number, since 2×1056512220² = 2232436142018656800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1056512221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8804209 + ... + 8804328.

It is an arithmetic number, because the mean of its divisors is an integer number (123259766).

Almost surely, 2^1056512220 is an apocalyptic number.

1056512220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1056512220 is an abundant number, since it is smaller than the sum of its proper divisors (1901722164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1056512220 is a wasteful number, since it uses less digits than its factorization.

1056512220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17608549 (or 17608547 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1056512220 is about 32504.0339035019. The cubic root of 1056512220 is about 1018.4932964065.

Adding to 1056512220 its reverse (222156501), we get a palindrome (1278668721).

The spelling of 1056512220 in words is "one billion, fifty-six million, five hundred twelve thousand, two hundred twenty".