51126247 has 4 divisors (see below), whose sum is σ = 51142176. Its totient is φ = 51110320.

The previous prime is 51126241. The next prime is 51126277. The reversal of 51126247 is 74262115.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51126247 - 2¹⁵ = 51093479 is a prime.

It is a super-2 number, since 2×51126247² = 5227786264610018, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51126241) 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, 1279 + ... + 10192.

It is an arithmetic number, because the mean of its divisors is an integer number (12785544).

Almost surely, 2^51126247 is an apocalyptic number.

51126247 is a deficient number, since it is larger than the sum of its proper divisors (15929).

51126247 is a wasteful number, since it uses less digits than its factorization.

51126247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15928.

The product of its digits is 3360, while the sum is 28.

The square root of 51126247 is about 7150.2620231709. The cubic root of 51126247 is about 371.1487235601.

The spelling of 51126247 in words is "fifty-one million, one hundred twenty-six thousand, two hundred forty-seven".