51990343 has 2 divisors, whose sum is σ = 51990344. Its totient is φ = 51990342.

The previous prime is 51990307. The next prime is 51990347. The reversal of 51990343 is 34309915.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51990343 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51990299 and 51990308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51990347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25995171 + 25995172.

It is an arithmetic number, because the mean of its divisors is an integer number (25995172).

Almost surely, 2^51990343 is an apocalyptic number.

51990343 is a deficient number, since it is larger than the sum of its proper divisors (1).

51990343 is an equidigital number, since it uses as much as digits as its factorization.

51990343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 51990343 is about 7210.4329273630. The cubic root of 51990343 is about 373.2280085716.

The spelling of 51990343 in words is "fifty-one million, nine hundred ninety thousand, three hundred forty-three".