51155633233 has 2 divisors, whose sum is σ = 51155633234. Its totient is φ = 51155633232.

The previous prime is 51155633203. The next prime is 51155633239. The reversal of 51155633233 is 33233655115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50880471489 + 275161744 = 225567^2 + 16588^2 .

It is a cyclic number.

It is not a de Polignac number, because 51155633233 - 2²¹ = 51153536081 is a prime.

It is a super-2 number, since 2×51155633233² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51155633192 and 51155633201.

It is not a weakly prime, because it can be changed into another prime (51155633239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25577816616 + 25577816617.

It is an arithmetic number, because the mean of its divisors is an integer number (25577816617).

Almost surely, 2^51155633233 is an apocalyptic number.

It is an amenable number.

51155633233 is a deficient number, since it is larger than the sum of its proper divisors (1).

51155633233 is an equidigital number, since it uses as much as digits as its factorization.

51155633233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 121500, while the sum is 37.

The spelling of 51155633233 in words is "fifty-one billion, one hundred fifty-five million, six hundred thirty-three thousand, two hundred thirty-three".