1611228212 has 48 divisors (see below), whose sum is σ = 3111381504. Its totient is φ = 723996000.

The previous prime is 1611228173. The next prime is 1611228221. The reversal of 1611228212 is 2128221161.

It is a super-2 number, since 2×1611228212² = 5192112702289433888, 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 15 ways as a sum of consecutive naturals, for example, 2553137 + ... + 2553767.

It is an arithmetic number, because the mean of its divisors is an integer number (64820448).

Almost surely, 2^1611228212 is an apocalyptic number.

It is an amenable number.

1611228212 is a deficient number, since it is larger than the sum of its proper divisors (1500153292).

1611228212 is a wasteful number, since it uses less digits than its factorization.

1611228212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220 (or 1218 counting only the distinct ones).

The product of its digits is 768, while the sum is 26.

The square root of 1611228212 is about 40140.1072743958. The cubic root of 1611228212 is about 1172.3366777269.

Adding to 1611228212 its reverse (2128221161), we get a palindrome (3739449373).

The spelling of 1611228212 in words is "one billion, six hundred eleven million, two hundred twenty-eight thousand, two hundred twelve".