51553147 has 2 divisors, whose sum is σ = 51553148. Its totient is φ = 51553146.

The previous prime is 51553121. The next prime is 51553157. The reversal of 51553147 is 74135515.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51553147 - 2¹¹ = 51551099 is a prime.

It is equal to p_3088624 and since 51553147 and 3088624 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 (51553157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25776573 + 25776574.

It is an arithmetic number, because the mean of its divisors is an integer number (25776574).

Almost surely, 2^51553147 is an apocalyptic number.

51553147 is a deficient number, since it is larger than the sum of its proper divisors (1).

51553147 is an equidigital number, since it uses as much as digits as its factorization.

51553147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10500, while the sum is 31.

The square root of 51553147 is about 7180.0520193102. The cubic root of 51553147 is about 372.1788821530.

The spelling of 51553147 in words is "fifty-one million, five hundred fifty-three thousand, one hundred forty-seven".