1522672981 has 2 divisors, whose sum is σ = 1522672982. Its totient is φ = 1522672980.

The previous prime is 1522672967. The next prime is 1522673027. The reversal of 1522672981 is 1892762251.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 995970481 + 526702500 = 31559^2 + 22950^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1522672981 is a prime.

It is a super-4 number, since 4×1522672981⁴ (a number of 38 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1522682981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 761336490 + 761336491.

It is an arithmetic number, because the mean of its divisors is an integer number (761336491).

Almost surely, 2^1522672981 is an apocalyptic number.

It is an amenable number.

1522672981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1522672981 is an equidigital number, since it uses as much as digits as its factorization.

1522672981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 43.

The square root of 1522672981 is about 39021.4425796894. The cubic root of 1522672981 is about 1150.4529988506.

The spelling of 1522672981 in words is "one billion, five hundred twenty-two million, six hundred seventy-two thousand, nine hundred eighty-one".