51863533 has 2 divisors, whose sum is σ = 51863534. Its totient is φ = 51863532.

The previous prime is 51863519. The next prime is 51863557. The reversal of 51863533 is 33536815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43586404 + 8277129 = 6602^2 + 2877^2 .

It is a cyclic number.

It is not a de Polignac number, because 51863533 - 2⁵ = 51863501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51863563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25931766 + 25931767.

It is an arithmetic number, because the mean of its divisors is an integer number (25931767).

Almost surely, 2^51863533 is an apocalyptic number.

It is an amenable number.

51863533 is a deficient number, since it is larger than the sum of its proper divisors (1).

51863533 is an equidigital number, since it uses as much as digits as its factorization.

51863533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 34.

The square root of 51863533 is about 7201.6340506860. The cubic root of 51863533 is about 372.9243138631.

The spelling of 51863533 in words is "fifty-one million, eight hundred sixty-three thousand, five hundred thirty-three".