551074981 has 2 divisors, whose sum is σ = 551074982. Its totient is φ = 551074980.

The previous prime is 551074957. The next prime is 551075017. The reversal of 551074981 is 189470155.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 332478756 + 218596225 = 18234^2 + 14785^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551074981 is a prime.

It is a super-2 number, since 2×551074981² = 607367269368300722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551074921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275537490 + 275537491.

It is an arithmetic number, because the mean of its divisors is an integer number (275537491).

Almost surely, 2^551074981 is an apocalyptic number.

It is an amenable number.

551074981 is a deficient number, since it is larger than the sum of its proper divisors (1).

551074981 is an equidigital number, since it uses as much as digits as its factorization.

551074981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50400, while the sum is 40.

The square root of 551074981 is about 23474.9862832761. The cubic root of 551074981 is about 819.8547139983.

The spelling of 551074981 in words is "five hundred fifty-one million, seventy-four thousand, nine hundred eighty-one".