51612146 has 4 divisors (see below), whose sum is σ = 77418222. Its totient is φ = 25806072.

The previous prime is 51612133. The next prime is 51612149. The reversal of 51612146 is 64121615.

51612146 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64121615 = 5 ⋅12824323.

It can be written as a sum of positive squares in only one way, i.e., 50908225 + 703921 = 7135^2 + 839^2 .

It is a super-2 number, since 2×51612146² = 5327627229450632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51612149) by changing a digit.

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 as a sum of consecutive naturals, namely, 12903035 + ... + 12903038.

Almost surely, 2^51612146 is an apocalyptic number.

51612146 is a deficient number, since it is larger than the sum of its proper divisors (25806076).

51612146 is a wasteful number, since it uses less digits than its factorization.

51612146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25806075.

The product of its digits is 1440, while the sum is 26.

The square root of 51612146 is about 7184.1593801920. The cubic root of 51612146 is about 372.3208056626.

The spelling of 51612146 in words is "fifty-one million, six hundred twelve thousand, one hundred forty-six".