51661622 has 8 divisors (see below), whose sum is σ = 77588400. Its totient is φ = 25798824.

The previous prime is 51661613. The next prime is 51661637. The reversal of 51661622 is 22616615.

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

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, 13922 + ... + 17237.

It is an arithmetic number, because the mean of its divisors is an integer number (9698550).

Almost surely, 2^51661622 is an apocalyptic number.

51661622 is a deficient number, since it is larger than the sum of its proper divisors (25926778).

51661622 is a wasteful number, since it uses less digits than its factorization.

51661622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31990.

The product of its digits is 4320, while the sum is 29.

The square root of 51661622 is about 7187.6019644941. The cubic root of 51661622 is about 372.4397380106.

The spelling of 51661622 in words is "fifty-one million, six hundred sixty-one thousand, six hundred twenty-two".