51261118 has 4 divisors (see below), whose sum is σ = 76891680. Its totient is φ = 25630558.

The previous prime is 51261113. The next prime is 51261121. The reversal of 51261118 is 81116215.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 51261092 and 51261101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51261113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12815278 + ... + 12815281.

It is an arithmetic number, because the mean of its divisors is an integer number (19222920).

Almost surely, 2^51261118 is an apocalyptic number.

51261118 is a deficient number, since it is larger than the sum of its proper divisors (25630562).

51261118 is a wasteful number, since it uses less digits than its factorization.

51261118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25630561.

The product of its digits is 480, while the sum is 25.

The square root of 51261118 is about 7159.6870043320. The cubic root of 51261118 is about 371.4748003463.

The spelling of 51261118 in words is "fifty-one million, two hundred sixty-one thousand, one hundred eighteen".