51245401 has 2 divisors, whose sum is σ = 51245402. Its totient is φ = 51245400.

The previous prime is 51245393. The next prime is 51245423. The reversal of 51245401 is 10454215.

It is an a-pointer prime, because the next prime (51245423) can be obtained adding 51245401 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40513225 + 10732176 = 6365^2 + 3276^2 .

It is a cyclic number.

It is not a de Polignac number, because 51245401 - 2³ = 51245393 is a prime.

It is a super-2 number, since 2×51245401² = 5252182247301602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51245431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25622700 + 25622701.

It is an arithmetic number, because the mean of its divisors is an integer number (25622701).

Almost surely, 2^51245401 is an apocalyptic number.

It is an amenable number.

51245401 is a deficient number, since it is larger than the sum of its proper divisors (1).

51245401 is an equidigital number, since it uses as much as digits as its factorization.

51245401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 51245401 is about 7158.5893163388. The cubic root of 51245401 is about 371.4368309166.

Adding to 51245401 its reverse (10454215), we get a palindrome (61699616).

The spelling of 51245401 in words is "fifty-one million, two hundred forty-five thousand, four hundred one".