51401401 has 2 divisors, whose sum is σ = 51401402. Its totient is φ = 51401400.

The previous prime is 51401393. The next prime is 51401411. The reversal of 51401401 is 10410415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25999801 + 25401600 = 5099^2 + 5040^2 .

It is a cyclic number.

It is not a de Polignac number, because 51401401 - 2³ = 51401393 is a prime.

It is not a weakly prime, because it can be changed into another prime (51401411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25700700 + 25700701.

It is an arithmetic number, because the mean of its divisors is an integer number (25700701).

Almost surely, 2^51401401 is an apocalyptic number.

It is an amenable number.

51401401 is a deficient number, since it is larger than the sum of its proper divisors (1).

51401401 is an equidigital number, since it uses as much as digits as its factorization.

51401401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 51401401 is about 7169.4770381109. The cubic root of 51401401 is about 371.8133554200.

Adding to 51401401 its reverse (10410415), we get a palindrome (61811816).

The spelling of 51401401 in words is "fifty-one million, four hundred one thousand, four hundred one".