51119247 has 4 divisors (see below), whose sum is σ = 68159000. Its totient is φ = 34079496.

The previous prime is 51119227. The next prime is 51119249. The reversal of 51119247 is 74291115.

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

It is not a de Polignac number, because 51119247 - 2⁶ = 51119183 is a prime.

It is a super-2 number, since 2×51119247² = 5226354827694018, 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 (51119249) 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, 8519872 + ... + 8519877.

It is an arithmetic number, because the mean of its divisors is an integer number (17039750).

Almost surely, 2^51119247 is an apocalyptic number.

51119247 is a deficient number, since it is larger than the sum of its proper divisors (17039753).

51119247 is a wasteful number, since it uses less digits than its factorization.

51119247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17039752.

The product of its digits is 2520, while the sum is 30.

The square root of 51119247 is about 7149.7725138636. The cubic root of 51119247 is about 371.1317840571.

The spelling of 51119247 in words is "fifty-one million, one hundred nineteen thousand, two hundred forty-seven".