253551461 has 2 divisors, whose sum is σ = 253551462. Its totient is φ = 253551460.

The previous prime is 253551451. The next prime is 253551469. The reversal of 253551461 is 164155352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 253414561 + 136900 = 15919^2 + 370^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-253551461 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253551469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126775730 + 126775731.

It is an arithmetic number, because the mean of its divisors is an integer number (126775731).

Almost surely, 2^253551461 is an apocalyptic number.

It is an amenable number.

253551461 is a deficient number, since it is larger than the sum of its proper divisors (1).

253551461 is an equidigital number, since it uses as much as digits as its factorization.

253551461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18000, while the sum is 32.

The square root of 253551461 is about 15923.2993126425. The cubic root of 253551461 is about 632.9295501626.

The spelling of 253551461 in words is "two hundred fifty-three million, five hundred fifty-one thousand, four hundred sixty-one".