51001821406 has 8 divisors (see below), whose sum is σ = 76899119904. Its totient is φ = 25368781440.

The previous prime is 51001821389. The next prime is 51001821427. The reversal of 51001821406 is 60412810015.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66064150 + ... + 66064921.

It is an arithmetic number, because the mean of its divisors is an integer number (9612389988).

Almost surely, 2^51001821406 is an apocalyptic number.

51001821406 is a deficient number, since it is larger than the sum of its proper divisors (25897298498).

51001821406 is a wasteful number, since it uses less digits than its factorization.

51001821406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132129266.

The product of its (nonzero) digits is 1920, while the sum is 28.

The spelling of 51001821406 in words is "fifty-one billion, one million, eight hundred twenty-one thousand, four hundred six".