1661050031 has 2 divisors, whose sum is σ = 1661050032. Its totient is φ = 1661050030.

The previous prime is 1661050021. The next prime is 1661050043. The reversal of 1661050031 is 1300501661.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1661050031 is a prime.

It is a super-2 number, since 2×1661050031² = 5518174410970201922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1661049979 and 1661050006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1661050021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830525015 + 830525016.

It is an arithmetic number, because the mean of its divisors is an integer number (830525016).

Almost surely, 2^1661050031 is an apocalyptic number.

1661050031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1661050031 is an equidigital number, since it uses as much as digits as its factorization.

1661050031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 1661050031 is about 40755.9815364567. The cubic root of 1661050031 is about 1184.2977509979.

Adding to 1661050031 its reverse (1300501661), we get a palindrome (2961551692).

The spelling of 1661050031 in words is "one billion, six hundred sixty-one million, fifty thousand, thirty-one".