51126653 has 4 divisors (see below), whose sum is σ = 51147708. Its totient is φ = 51105600.

The previous prime is 51126617. The next prime is 51126679. The reversal of 51126653 is 35662115.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35662115 = 5 ⋅7132423.

It can be written as a sum of positive squares in 2 ways, for example, as 8655364 + 42471289 = 2942^2 + 6517^2 .

It is a cyclic number.

It is not a de Polignac number, because 51126653 - 2¹⁰ = 51125629 is a prime.

It is a super-2 number, since 2×51126653² = 5227869293964818, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51120653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6326 + ... + 11927.

It is an arithmetic number, because the mean of its divisors is an integer number (12786927).

Almost surely, 2^51126653 is an apocalyptic number.

It is an amenable number.

51126653 is a deficient number, since it is larger than the sum of its proper divisors (21055).

51126653 is a wasteful number, since it uses less digits than its factorization.

51126653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21054.

The product of its digits is 5400, while the sum is 29.

The square root of 51126653 is about 7150.2904136825. The cubic root of 51126653 is about 371.1497060038.

Adding to 51126653 its reverse (35662115), we get a palindrome (86788768).

The spelling of 51126653 in words is "fifty-one million, one hundred twenty-six thousand, six hundred fifty-three".