51155633223 has 6 divisors (see below), whose sum is σ = 73891470224. Its totient is φ = 34103755476.

The previous prime is 51155633203. The next prime is 51155633233. The reversal of 51155633223 is 32233655115.

51155633223 is a `hidden beast` number, since 5 + 1 + 15 + 5 + 633 + 2 + 2 + 3 = 666.

It is not a de Polignac number, because 51155633223 - 2⁶ = 51155633159 is a prime.

It is a super-2 number, since 2×51155633223² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51155633203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2841979615 + ... + 2841979632.

Almost surely, 2^51155633223 is an apocalyptic number.

51155633223 is a deficient number, since it is larger than the sum of its proper divisors (22735837001).

51155633223 is a wasteful number, since it uses less digits than its factorization.

51155633223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5683959253 (or 5683959250 counting only the distinct ones).

The product of its digits is 81000, while the sum is 36.

The spelling of 51155633223 in words is "fifty-one billion, one hundred fifty-five million, six hundred thirty-three thousand, two hundred twenty-three".