51501547 has 2 divisors, whose sum is σ = 51501548. Its totient is φ = 51501546.

The previous prime is 51501539. The next prime is 51501553. The reversal of 51501547 is 74510515.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51501547 - 2³ = 51501539 is a prime.

It is equal to p_3085705 and since 51501547 and 3085705 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (51501557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25750773 + 25750774.

It is an arithmetic number, because the mean of its divisors is an integer number (25750774).

Almost surely, 2^51501547 is an apocalyptic number.

51501547 is a deficient number, since it is larger than the sum of its proper divisors (1).

51501547 is an equidigital number, since it uses as much as digits as its factorization.

51501547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3500, while the sum is 28.

The square root of 51501547 is about 7176.4578309916. The cubic root of 51501547 is about 372.0546683252.

The spelling of 51501547 in words is "fifty-one million, five hundred one thousand, five hundred forty-seven".