1621341131 has 2 divisors, whose sum is σ = 1621341132. Its totient is φ = 1621341130.

The previous prime is 1621341097. The next prime is 1621341151. The reversal of 1621341131 is 1311431261.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1621341131 - 2⁶ = 1621341067 is a prime.

It is a super-2 number, since 2×1621341131² = 5257494126144718322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1621341097 and 1621341106.

It is not a weakly prime, because it can be changed into another prime (1621341151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 810670565 + 810670566.

It is an arithmetic number, because the mean of its divisors is an integer number (810670566).

Almost surely, 2^1621341131 is an apocalyptic number.

1621341131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1621341131 is an equidigital number, since it uses as much as digits as its factorization.

1621341131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 23.

The square root of 1621341131 is about 40265.8804821154. The cubic root of 1621341131 is about 1174.7842986575.

Adding to 1621341131 its reverse (1311431261), we get a palindrome (2932772392).

The spelling of 1621341131 in words is "one billion, six hundred twenty-one million, three hundred forty-one thousand, one hundred thirty-one".