51621652 has 6 divisors (see below), whose sum is σ = 90337898. Its totient is φ = 25810824.

The previous prime is 51621617. The next prime is 51621659. The reversal of 51621652 is 25612615.

51621652 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 31854736 + 19766916 = 5644^2 + 4446^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51621652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51621659) 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, 6452703 + ... + 6452710.

Almost surely, 2^51621652 is an apocalyptic number.

It is an amenable number.

51621652 is a deficient number, since it is larger than the sum of its proper divisors (38716246).

51621652 is a wasteful number, since it uses less digits than its factorization.

51621652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12905417 (or 12905415 counting only the distinct ones).

The product of its digits is 3600, while the sum is 28.

The square root of 51621652 is about 7184.8209441850. The cubic root of 51621652 is about 372.3436624549.

The spelling of 51621652 in words is "fifty-one million, six hundred twenty-one thousand, six hundred fifty-two".