51881653 has 2 divisors, whose sum is σ = 51881654. Its totient is φ = 51881652.

The previous prime is 51881623. The next prime is 51881657. The reversal of 51881653 is 35618815.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36687249 + 15194404 = 6057^2 + 3898^2 .

It is a cyclic number.

It is not a de Polignac number, because 51881653 - 2¹³ = 51873461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51881657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25940826 + 25940827.

It is an arithmetic number, because the mean of its divisors is an integer number (25940827).

Almost surely, 2^51881653 is an apocalyptic number.

It is an amenable number.

51881653 is a deficient number, since it is larger than the sum of its proper divisors (1).

51881653 is an equidigital number, since it uses as much as digits as its factorization.

51881653 is an odious number, because the sum of its binary digits is odd.

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

The square root of 51881653 is about 7202.8919886390. The cubic root of 51881653 is about 372.9677393772.

The spelling of 51881653 in words is "fifty-one million, eight hundred eighty-one thousand, six hundred fifty-three".