51556701 has 16 divisors (see below), whose sum is σ = 79737344. Its totient is φ = 29020464.

The previous prime is 51556667. The next prime is 51556717. The reversal of 51556701 is 10765515.

51556701 = 844² + 845² + ... + 910².

51556701 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51556701 - 2¹⁸ = 51294557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51552701) 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 in 15 ways as a sum of consecutive naturals, for example, 16915 + ... + 19728.

It is an arithmetic number, because the mean of its divisors is an integer number (4983584).

Almost surely, 2^51556701 is an apocalyptic number.

It is an amenable number.

51556701 is a deficient number, since it is larger than the sum of its proper divisors (28180643).

51556701 is a wasteful number, since it uses less digits than its factorization.

51556701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36720.

The product of its (nonzero) digits is 5250, while the sum is 30.

The square root of 51556701 is about 7180.2995062880. The cubic root of 51556701 is about 372.1874344492.

The spelling of 51556701 in words is "fifty-one million, five hundred fifty-six thousand, seven hundred one".