51123867 has 8 divisors (see below), whose sum is σ = 70364160. Its totient is φ = 32983080.

The previous prime is 51123859. The next prime is 51123869. The reversal of 51123867 is 76832115.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51123867 - 2³ = 51123859 is a prime.

It is a super-2 number, since 2×51123867² = 5227299554067378, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51123869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274767 + ... + 274952.

It is an arithmetic number, because the mean of its divisors is an integer number (8795520).

Almost surely, 2^51123867 is an apocalyptic number.

51123867 is a deficient number, since it is larger than the sum of its proper divisors (19240293).

51123867 is a wasteful number, since it uses less digits than its factorization.

51123867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549753.

The product of its digits is 10080, while the sum is 33.

The square root of 51123867 is about 7150.0955937666. The cubic root of 51123867 is about 371.1429643026.

The spelling of 51123867 in words is "fifty-one million, one hundred twenty-three thousand, eight hundred sixty-seven".