30983561261 has 4 divisors (see below), whose sum is σ = 30985659900. Its totient is φ = 30981462624.

The previous prime is 30983561237. The next prime is 30983561347. The reversal of 30983561261 is 16216538903.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14601097225 + 16382464036 = 120835^2 + 127994^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30983561261 is a prime.

It is a super-4 number, since 4×30983561261⁴ (a number of 43 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30983561201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1027016 + ... + 1056753.

It is an arithmetic number, because the mean of its divisors is an integer number (7746414975).

Almost surely, 2^30983561261 is an apocalyptic number.

It is an amenable number.

30983561261 is a deficient number, since it is larger than the sum of its proper divisors (2098639).

30983561261 is a wasteful number, since it uses less digits than its factorization.

30983561261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2098638.

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 30983561261 in words is "thirty billion, nine hundred eighty-three million, five hundred sixty-one thousand, two hundred sixty-one".