51111022 has 8 divisors (see below), whose sum is σ = 76912416. Its totient is φ = 25473552.

The previous prime is 51111013. The next prime is 51111029. The reversal of 51111022 is 22011115.

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

It is a super-2 number, since 2×51111022² = 5224673139768968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51110993 and 51111011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51111029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40198 + ... + 41449.

It is an arithmetic number, because the mean of its divisors is an integer number (9614052).

Almost surely, 2^51111022 is an apocalyptic number.

51111022 is a deficient number, since it is larger than the sum of its proper divisors (25801394).

51111022 is a wasteful number, since it uses less digits than its factorization.

51111022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81962.

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 51111022 is about 7149.1972975992. The cubic root of 51111022 is about 371.1118781649. Note that the first 3 decimals are identical.

Adding to 51111022 its reverse (22011115), we get a palindrome (73122137).

The spelling of 51111022 in words is "fifty-one million, one hundred eleven thousand, twenty-two".