651755243 has 2 divisors, whose sum is σ = 651755244. Its totient is φ = 651755242.

The previous prime is 651755207. The next prime is 651755249. The reversal of 651755243 is 342557156.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 651755243 - 2¹⁶ = 651689707 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 651755197 and 651755206.

It is not a weakly prime, because it can be changed into another prime (651755249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325877621 + 325877622.

It is an arithmetic number, because the mean of its divisors is an integer number (325877622).

Almost surely, 2^651755243 is an apocalyptic number.

651755243 is a deficient number, since it is larger than the sum of its proper divisors (1).

651755243 is an equidigital number, since it uses as much as digits as its factorization.

651755243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 126000, while the sum is 38.

The square root of 651755243 is about 25529.4975077850. The cubic root of 651755243 is about 867.0181276855.

The spelling of 651755243 in words is "six hundred fifty-one million, seven hundred fifty-five thousand, two hundred forty-three".