4212550981 has 2 divisors, whose sum is σ = 4212550982. Its totient is φ = 4212550980.

The previous prime is 4212550967. The next prime is 4212551003. The reversal of 4212550981 is 1890552124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3173068900 + 1039482081 = 56330^2 + 32241^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4212550981 is a prime.

It is a super-2 number, since 2×4212550981² = 35491171535048124722, 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 4212550981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4212550931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2106275490 + 2106275491.

It is an arithmetic number, because the mean of its divisors is an integer number (2106275491).

Almost surely, 2^4212550981 is an apocalyptic number.

It is an amenable number.

4212550981 is a deficient number, since it is larger than the sum of its proper divisors (1).

4212550981 is an equidigital number, since it uses as much as digits as its factorization.

4212550981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 37.

The square root of 4212550981 is about 64904.1676704971. The cubic root of 4212550981 is about 1615.0341995461.

The spelling of 4212550981 in words is "four billion, two hundred twelve million, five hundred fifty thousand, nine hundred eighty-one".