51550433901 has 24 divisors (see below), whose sum is σ = 77108129280. Its totient is φ = 33147967776.

The previous prime is 51550433867. The next prime is 51550433903. The reversal of 51550433901 is 10933405515.

It is a happy number.

51550433901 is a `hidden beast` number, since 515 + 50 + 4 + 3 + 3 + 90 + 1 = 666.

It is not a de Polignac number, because 51550433901 - 2¹⁷ = 51550302829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51550433903) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 156100 + ... + 357026.

It is an arithmetic number, because the mean of its divisors is an integer number (3212838720).

Almost surely, 2^51550433901 is an apocalyptic number.

It is an amenable number.

51550433901 is a deficient number, since it is larger than the sum of its proper divisors (25557695379).

51550433901 is a wasteful number, since it uses less digits than its factorization.

51550433901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201945 (or 201942 counting only the distinct ones).

The product of its (nonzero) digits is 40500, while the sum is 36.

The spelling of 51550433901 in words is "fifty-one billion, five hundred fifty million, four hundred thirty-three thousand, nine hundred one".