51241387 has 2 divisors, whose sum is σ = 51241388. Its totient is φ = 51241386.

The previous prime is 51241343. The next prime is 51241409. The reversal of 51241387 is 78314215.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51241387 - 2⁷ = 51241259 is a prime.

It is not a weakly prime, because it can be changed into another prime (51241787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25620693 + 25620694.

It is an arithmetic number, because the mean of its divisors is an integer number (25620694).

Almost surely, 2^51241387 is an apocalyptic number.

51241387 is a deficient number, since it is larger than the sum of its proper divisors (1).

51241387 is an equidigital number, since it uses as much as digits as its factorization.

51241387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 31.

The square root of 51241387 is about 7158.3089483481. The cubic root of 51241387 is about 371.4271325740.

The spelling of 51241387 in words is "fifty-one million, two hundred forty-one thousand, three hundred eighty-seven".