51106653 has 16 divisors (see below), whose sum is σ = 81538240. Its totient is φ = 31450032.

The previous prime is 51106639. The next prime is 51106663. The reversal of 51106653 is 35660115.

It is a happy number.

51106653 is a `hidden beast` number, since 5 + 1 + 1 + 0 + 6 + 653 = 666.

It is not a de Polignac number, because 51106653 - 2⁹ = 51106141 is a prime.

It is a super-2 number, since 2×51106653² = 5223779961724818, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51106603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72451 + ... + 73152.

It is an arithmetic number, because the mean of its divisors is an integer number (5096140).

Almost surely, 2^51106653 is an apocalyptic number.

It is an amenable number.

51106653 is a deficient number, since it is larger than the sum of its proper divisors (30431587).

51106653 is a wasteful number, since it uses less digits than its factorization.

51106653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145625 (or 145619 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 51106653 is about 7148.8917322897. The cubic root of 51106653 is about 371.1013035769.

Adding to 51106653 its reverse (35660115), we get a palindrome (86766768).

The spelling of 51106653 in words is "fifty-one million, one hundred six thousand, six hundred fifty-three".