51220046 has 8 divisors (see below), whose sum is σ = 77576304. Its totient is φ = 25361280.

The previous prime is 51220033. The next prime is 51220063. The reversal of 51220046 is 64002215.

It is a happy number.

51220046 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×51220046² = 5246986224484232, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124115 + ... + 124526.

It is an arithmetic number, because the mean of its divisors is an integer number (9697038).

Almost surely, 2^51220046 is an apocalyptic number.

51220046 is a deficient number, since it is larger than the sum of its proper divisors (26356258).

51220046 is a wasteful number, since it uses less digits than its factorization.

51220046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248746.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 51220046 is about 7156.8181477525. The cubic root of 51220046 is about 371.3755614543.

The spelling of 51220046 in words is "fifty-one million, two hundred twenty thousand, forty-six".