51351499 has 2 divisors, whose sum is σ = 51351500. Its totient is φ = 51351498.

The previous prime is 51351497. The next prime is 51351527. The reversal of 51351499 is 99415315.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51351499 - 2¹ = 51351497 is a prime.

Together with 51351497, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (51351493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25675749 + 25675750.

It is an arithmetic number, because the mean of its divisors is an integer number (25675750).

Almost surely, 2^51351499 is an apocalyptic number.

51351499 is a deficient number, since it is larger than the sum of its proper divisors (1).

51351499 is an equidigital number, since it uses as much as digits as its factorization.

51351499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24300, while the sum is 37.

The square root of 51351499 is about 7165.9960228847. The cubic root of 51351499 is about 371.6929939948.

The spelling of 51351499 in words is "fifty-one million, three hundred fifty-one thousand, four hundred ninety-nine".