46219981 has 2 divisors, whose sum is σ = 46219982. Its totient is φ = 46219980.

The previous prime is 46219909. The next prime is 46220003. The reversal of 46219981 is 18991264.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31741956 + 14478025 = 5634^2 + 3805^2 .

It is a cyclic number.

It is not a de Polignac number, because 46219981 - 2⁹ = 46219469 is a prime.

It is a super-2 number, since 2×46219981² = 4272573287280722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (46219081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23109990 + 23109991.

It is an arithmetic number, because the mean of its divisors is an integer number (23109991).

Almost surely, 2^46219981 is an apocalyptic number.

It is an amenable number.

46219981 is a deficient number, since it is larger than the sum of its proper divisors (1).

46219981 is an equidigital number, since it uses as much as digits as its factorization.

46219981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 40.

The square root of 46219981 is about 6798.5278553522. The cubic root of 46219981 is about 358.8750402430.

The spelling of 46219981 in words is "forty-six million, two hundred nineteen thousand, nine hundred eighty-one".