51972367 has 2 divisors, whose sum is σ = 51972368. Its totient is φ = 51972366.

The previous prime is 51972329. The next prime is 51972377. The reversal of 51972367 is 76327915.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51972367 - 2¹¹ = 51970319 is a prime.

It is a super-2 number, since 2×51972367² = 5402253863165378, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51972377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25986183 + 25986184.

It is an arithmetic number, because the mean of its divisors is an integer number (25986184).

Almost surely, 2^51972367 is an apocalyptic number.

51972367 is a deficient number, since it is larger than the sum of its proper divisors (1).

51972367 is an equidigital number, since it uses as much as digits as its factorization.

51972367 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 79380, while the sum is 40.

The square root of 51972367 is about 7209.1862925021. The cubic root of 51972367 is about 373.1849882741.

The spelling of 51972367 in words is "fifty-one million, nine hundred seventy-two thousand, three hundred sixty-seven".