46315981 has 2 divisors, whose sum is σ = 46315982. Its totient is φ = 46315980.

The previous prime is 46315957. The next prime is 46316021. The reversal of 46315981 is 18951364.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42575625 + 3740356 = 6525^2 + 1934^2 .

It is a cyclic number.

It is not a de Polignac number, because 46315981 - 2⁵ = 46315949 is a prime.

It is a super-2 number, since 2×46315981² = 4290340191984722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 46315981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (46315931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23157990 + 23157991.

It is an arithmetic number, because the mean of its divisors is an integer number (23157991).

Almost surely, 2^46315981 is an apocalyptic number.

It is an amenable number.

46315981 is a deficient number, since it is larger than the sum of its proper divisors (1).

46315981 is an equidigital number, since it uses as much as digits as its factorization.

46315981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 37.

The square root of 46315981 is about 6805.5845450630. The cubic root of 46315981 is about 359.1233324178.

The spelling of 46315981 in words is "forty-six million, three hundred fifteen thousand, nine hundred eighty-one".