456031981 has 8 divisors (see below), whose sum is σ = 468301824. Its totient is φ = 443898000.

The previous prime is 456031943. The next prime is 456031991. The reversal of 456031981 is 189130654.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 456031981 - 2¹⁹ = 455507693 is a prime.

It is a super-2 number, since 2×456031981² = 415930335389568722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 456031981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (456031921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27145 + ... + 40606.

It is an arithmetic number, because the mean of its divisors is an integer number (58537728).

Almost surely, 2^456031981 is an apocalyptic number.

It is an amenable number.

456031981 is a deficient number, since it is larger than the sum of its proper divisors (12269843).

456031981 is a wasteful number, since it uses less digits than its factorization.

456031981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67931.

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

The square root of 456031981 is about 21354.9053147046. The cubic root of 456031981 is about 769.7182198281.

The spelling of 456031981 in words is "four hundred fifty-six million, thirty-one thousand, nine hundred eighty-one".