51420701 has 2 divisors, whose sum is σ = 51420702. Its totient is φ = 51420700.

The previous prime is 51420673. The next prime is 51420703. The reversal of 51420701 is 10702415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25908100 + 25512601 = 5090^2 + 5051^2 .

It is a cyclic number.

It is not a de Polignac number, because 51420701 - 2⁶ = 51420637 is a prime.

Together with 51420703, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51420703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25710350 + 25710351.

It is an arithmetic number, because the mean of its divisors is an integer number (25710351).

Almost surely, 2^51420701 is an apocalyptic number.

It is an amenable number.

51420701 is a deficient number, since it is larger than the sum of its proper divisors (1).

51420701 is an equidigital number, since it uses as much as digits as its factorization.

51420701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 51420701 is about 7170.8228955957. The cubic root of 51420701 is about 371.8598852789.

The spelling of 51420701 in words is "fifty-one million, four hundred twenty thousand, seven hundred one".