4201501781 has 2 divisors, whose sum is σ = 4201501782. Its totient is φ = 4201501780.

The previous prime is 4201501769. The next prime is 4201501813. The reversal of 4201501781 is 1871051024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3437476900 + 764024881 = 58630^2 + 27641^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4201501781 is a prime.

It is a super-2 number, since 2×4201501781² = 35305234431492343922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4201501721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2100750890 + 2100750891.

It is an arithmetic number, because the mean of its divisors is an integer number (2100750891).

Almost surely, 2^4201501781 is an apocalyptic number.

It is an amenable number.

4201501781 is a deficient number, since it is larger than the sum of its proper divisors (1).

4201501781 is an equidigital number, since it uses as much as digits as its factorization.

4201501781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2240, while the sum is 29.

The square root of 4201501781 is about 64818.9924404877. The cubic root of 4201501781 is about 1613.6209260044.

The spelling of 4201501781 in words is "four billion, two hundred one million, five hundred one thousand, seven hundred eighty-one".