51246331 has 4 divisors (see below), whose sum is σ = 51365664. Its totient is φ = 51127000.

The previous prime is 51246329. The next prime is 51246337. The reversal of 51246331 is 13364215.

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 51246331 - 2¹ = 51246329 is a prime.

It is a super-2 number, since 2×51246331² = 5252372881923122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51246296 and 51246305.

It is not an unprimeable number, because it can be changed into a prime (51246337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59020 + ... + 59881.

It is an arithmetic number, because the mean of its divisors is an integer number (12841416).

Almost surely, 2^51246331 is an apocalyptic number.

51246331 is a deficient number, since it is larger than the sum of its proper divisors (119333).

51246331 is a wasteful number, since it uses less digits than its factorization.

51246331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119332.

The product of its digits is 2160, while the sum is 25.

The square root of 51246331 is about 7158.6542729762. The cubic root of 51246331 is about 371.4390778445.

The spelling of 51246331 in words is "fifty-one million, two hundred forty-six thousand, three hundred thirty-one".