53851561 has 2 divisors, whose sum is σ = 53851562. Its totient is φ = 53851560.

The previous prime is 53851547. The next prime is 53851571. The reversal of 53851561 is 16515835.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31573161 + 22278400 = 5619^2 + 4720^2 .

It is a cyclic number.

It is not a de Polignac number, because 53851561 - 2¹⁹ = 53327273 is a prime.

It is not a weakly prime, because it can be changed into another prime (53851531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26925780 + 26925781.

It is an arithmetic number, because the mean of its divisors is an integer number (26925781).

Almost surely, 2^53851561 is an apocalyptic number.

It is an amenable number.

53851561 is a deficient number, since it is larger than the sum of its proper divisors (1).

53851561 is an equidigital number, since it uses as much as digits as its factorization.

53851561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18000, while the sum is 34.

The square root of 53851561 is about 7338.3622832346. The cubic root of 53851561 is about 377.6296611744.

The spelling of 53851561 in words is "fifty-three million, eight hundred fifty-one thousand, five hundred sixty-one".