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51225701 is a prime number
BaseRepresentation
bin1100001101101…
…0010001100101
310120101112110012
43003122101211
5101103210301
65025540005
71161261032
oct303322145
9116345405
1051225701
1126a0869a
12151a4605
13a7c7287
146b36389
15476cebb
hex30da465

51225701 has 2 divisors, whose sum is σ = 51225702. Its totient is φ = 51225700.

The previous prime is 51225689. The next prime is 51225703. The reversal of 51225701 is 10752215.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28890625 + 22335076 = 5375^2 + 4726^2 .

It is a cyclic number.

It is not a de Polignac number, because 51225701 - 26 = 51225637 is a prime.

Together with 51225703, 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 (51225703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25612850 + 25612851.

It is an arithmetic number, because the mean of its divisors is an integer number (25612851).

Almost surely, 251225701 is an apocalyptic number.

It is an amenable number.

51225701 is a deficient number, since it is larger than the sum of its proper divisors (1).

51225701 is an equidigital number, since it uses as much as digits as its factorization.

51225701 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 51225701 is about 7157.2132146528. The cubic root of 51225701 is about 371.3892283138.

Adding to 51225701 its reverse (10752215), we get a palindrome (61977916).

The spelling of 51225701 in words is "fifty-one million, two hundred twenty-five thousand, seven hundred one".