253121437 has 2 divisors, whose sum is σ = 253121438. Its totient is φ = 253121436.

The previous prime is 253121431. The next prime is 253121443. The reversal of 253121437 is 734121352.

It is a balanced prime because it is at equal distance from previous prime (253121431) and next prime (253121443).

It can be written as a sum of positive squares in only one way, i.e., 138438756 + 114682681 = 11766^2 + 10709^2 .

It is a cyclic number.

It is not a de Polignac number, because 253121437 - 2¹¹ = 253119389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253121431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126560718 + 126560719.

It is an arithmetic number, because the mean of its divisors is an integer number (126560719).

Almost surely, 2^253121437 is an apocalyptic number.

It is an amenable number.

253121437 is a deficient number, since it is larger than the sum of its proper divisors (1).

253121437 is an equidigital number, since it uses as much as digits as its factorization.

253121437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 28.

The square root of 253121437 is about 15909.7906020161. The cubic root of 253121437 is about 632.5715309124.

Adding to 253121437 its reverse (734121352), we get a palindrome (987242789).

The spelling of 253121437 in words is "two hundred fifty-three million, one hundred twenty-one thousand, four hundred thirty-seven".