51000022 has 8 divisors (see below), whose sum is σ = 78967872. Its totient is φ = 24677400.

The previous prime is 50999999. The next prime is 51000041. The reversal of 51000022 is 22000015.

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

It is a junction number, because it is equal to n+sod(n) for n = 50999972 and 51000008.

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, 411229 + ... + 411352.

It is an arithmetic number, because the mean of its divisors is an integer number (9870984).

Almost surely, 2^51000022 is an apocalyptic number.

51000022 is a deficient number, since it is larger than the sum of its proper divisors (27967850).

51000022 is a wasteful number, since it uses less digits than its factorization.

51000022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822614.

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 51000022 is about 7141.4299688508. The cubic root of 51000022 is about 370.8430302504.

Adding to 51000022 its reverse (22000015), we get a palindrome (73000037).

The spelling of 51000022 in words is "fifty-one million, twenty-two", and thus it is an aban number and an uban number.