1632313121 has 4 divisors (see below), whose sum is σ = 1632676500. Its totient is φ = 1631949744.

The previous prime is 1632313117. The next prime is 1632313139. The reversal of 1632313121 is 1213132361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1213132361 = 7 ⋅173304623.

It can be written as a sum of positive squares in 2 ways, for example, as 1462297600 + 170015521 = 38240^2 + 13039^2 .

It is a cyclic number.

It is not a de Polignac number, because 1632313121 - 2² = 1632313117 is a prime.

It is a super-2 number, since 2×1632313121² = 5328892249977521282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1632313181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174866 + ... + 183963.

It is an arithmetic number, because the mean of its divisors is an integer number (408169125).

Almost surely, 2^1632313121 is an apocalyptic number.

It is an amenable number.

1632313121 is a deficient number, since it is larger than the sum of its proper divisors (363379).

1632313121 is an equidigital number, since it uses as much as digits as its factorization.

1632313121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363378.

The product of its digits is 648, while the sum is 23.

The square root of 1632313121 is about 40401.8950174370. The cubic root of 1632313121 is about 1177.4283555323.

Adding to 1632313121 its reverse (1213132361), we get a palindrome (2845445482).

The spelling of 1632313121 in words is "one billion, six hundred thirty-two million, three hundred thirteen thousand, one hundred twenty-one".