1633221140 has 12 divisors (see below), whose sum is σ = 3429764436. Its totient is φ = 653288448.

The previous prime is 1633221077. The next prime is 1633221151. The reversal of 1633221140 is 411223361.

It can be written as a sum of positive squares in 2 ways, for example, as 382750096 + 1250471044 = 19564^2 + 35362^2 .

It is a super-2 number, since 2×1633221140² = 5334822584285799200, 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 3 ways as a sum of consecutive naturals, for example, 40830509 + ... + 40830548.

It is an arithmetic number, because the mean of its divisors is an integer number (285813703).

Almost surely, 2^1633221140 is an apocalyptic number.

1633221140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1633221140 is an abundant number, since it is smaller than the sum of its proper divisors (1796543296).

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

1633221140 is a wasteful number, since it uses less digits than its factorization.

1633221140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81661066 (or 81661064 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1633221140 is about 40413.1307869113. The cubic root of 1633221140 is about 1177.6466406807.

It can be divided in two parts, 1633221 and 140, that added together give a palindrome (1633361).

The spelling of 1633221140 in words is "one billion, six hundred thirty-three million, two hundred twenty-one thousand, one hundred forty".