53121251 has 2 divisors, whose sum is σ = 53121252. Its totient is φ = 53121250.

The previous prime is 53121227. The next prime is 53121319. The reversal of 53121251 is 15212135.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53121251 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (53121221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26560625 + 26560626.

It is an arithmetic number, because the mean of its divisors is an integer number (26560626).

Almost surely, 2^53121251 is an apocalyptic number.

53121251 is a deficient number, since it is larger than the sum of its proper divisors (1).

53121251 is an equidigital number, since it uses as much as digits as its factorization.

53121251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 300, while the sum is 20.

The square root of 53121251 is about 7288.4326847409. The cubic root of 53121251 is about 375.9148059396.

Adding to 53121251 its reverse (15212135), we get a palindrome (68333386).

The spelling of 53121251 in words is "fifty-three million, one hundred twenty-one thousand, two hundred fifty-one".