51442499 has 2 divisors, whose sum is σ = 51442500. Its totient is φ = 51442498.

The previous prime is 51442453. The next prime is 51442507. The reversal of 51442499 is 99424415.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51442499 - 2⁸ = 51442243 is a prime.

It is not a weakly prime, because it can be changed into another prime (51442429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25721249 + 25721250.

It is an arithmetic number, because the mean of its divisors is an integer number (25721250).

Almost surely, 2^51442499 is an apocalyptic number.

51442499 is a deficient number, since it is larger than the sum of its proper divisors (1).

51442499 is an equidigital number, since it uses as much as digits as its factorization.

51442499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 38.

The square root of 51442499 is about 7172.3426437950. The cubic root of 51442499 is about 371.9124235012.

The spelling of 51442499 in words is "fifty-one million, four hundred forty-two thousand, four hundred ninety-nine".