51533519906 has 32 divisors (see below), whose sum is σ = 89054235648. Its totient is φ = 22135909840.

The previous prime is 51533519903. The next prime is 51533519909. The reversal of 51533519906 is 60991533515.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51533519903) and next prime (51533519909).

It is a super-3 number, since 3×51533519906³ (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (51533519903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 571526 + ... + 655521.

It is an arithmetic number, because the mean of its divisors is an integer number (2782944864).

Almost surely, 2^51533519906 is an apocalyptic number.

51533519906 is a deficient number, since it is larger than the sum of its proper divisors (37520715742).

51533519906 is a wasteful number, since it uses less digits than its factorization.

51533519906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227166.

The product of its (nonzero) digits is 546750, while the sum is 47.

The spelling of 51533519906 in words is "fifty-one billion, five hundred thirty-three million, five hundred nineteen thousand, nine hundred six".