51405701 has 2 divisors, whose sum is σ = 51405702. Its totient is φ = 51405700.

The previous prime is 51405647. The next prime is 51405709. The reversal of 51405701 is 10750415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40972801 + 10432900 = 6401^2 + 3230^2 .

It is a cyclic number.

It is not a de Polignac number, because 51405701 - 2¹⁰ = 51404677 is a prime.

It is a Chen prime.

It is equal to p_3080354 and since 51405701 and 3080354 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51405709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25702850 + 25702851.

It is an arithmetic number, because the mean of its divisors is an integer number (25702851).

Almost surely, 2^51405701 is an apocalyptic number.

It is an amenable number.

51405701 is a deficient number, since it is larger than the sum of its proper divisors (1).

51405701 is an equidigital number, since it uses as much as digits as its factorization.

51405701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 51405701 is about 7169.7769142422. The cubic root of 51405701 is about 371.8237231844.

The spelling of 51405701 in words is "fifty-one million, four hundred five thousand, seven hundred one".