572381981 has 2 divisors, whose sum is σ = 572381982. Its totient is φ = 572381980.

The previous prime is 572381969. The next prime is 572382001. The reversal of 572381981 is 189183275.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 410710756 + 161671225 = 20266^2 + 12715^2 .

It is a cyclic number.

It is not a de Polignac number, because 572381981 - 2²² = 568187677 is a prime.

It is a super-2 number, since 2×572381981² = 655242264346968722, which contains 22 as substring.

It is equal to p_29956436 and since 572381981 and 29956436 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (572381921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 286190990 + 286190991.

It is an arithmetic number, because the mean of its divisors is an integer number (286190991).

Almost surely, 2^572381981 is an apocalyptic number.

It is an amenable number.

572381981 is a deficient number, since it is larger than the sum of its proper divisors (1).

572381981 is an equidigital number, since it uses as much as digits as its factorization.

572381981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 44.

The square root of 572381981 is about 23924.5058674155. The cubic root of 572381981 is about 830.2877895908.

The spelling of 572381981 in words is "five hundred seventy-two million, three hundred eighty-one thousand, nine hundred eighty-one".