1980223951 has 2 divisors, whose sum is σ = 1980223952. Its totient is φ = 1980223950.

The previous prime is 1980223901. The next prime is 1980223961. The reversal of 1980223951 is 1593220891.

It is a strong prime.

It is an emirp because it is prime and its reverse (1593220891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1980223951 - 2⁹ = 1980223439 is a prime.

It is a super-2 number, since 2×1980223951² = 7842573792228100802, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1980223901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 990111975 + 990111976.

It is an arithmetic number, because the mean of its divisors is an integer number (990111976).

Almost surely, 2^1980223951 is an apocalyptic number.

1980223951 is a deficient number, since it is larger than the sum of its proper divisors (1).

1980223951 is an equidigital number, since it uses as much as digits as its factorization.

1980223951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 1980223951 is about 44499.7073136442. The cubic root of 1980223951 is about 1255.7545767700.

The spelling of 1980223951 in words is "one billion, nine hundred eighty million, two hundred twenty-three thousand, nine hundred fifty-one".