3261540157 has 2 divisors, whose sum is σ = 3261540158. Its totient is φ = 3261540156.

The previous prime is 3261540091. The next prime is 3261540181. The reversal of 3261540157 is 7510451623.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3147883236 + 113656921 = 56106^2 + 10661^2 .

It is a cyclic number.

It is not a de Polignac number, because 3261540157 - 2¹⁹ = 3261015869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3261543157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1630770078 + 1630770079.

It is an arithmetic number, because the mean of its divisors is an integer number (1630770079).

Almost surely, 2^3261540157 is an apocalyptic number.

It is an amenable number.

3261540157 is a deficient number, since it is larger than the sum of its proper divisors (1).

3261540157 is an equidigital number, since it uses as much as digits as its factorization.

3261540157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 3261540157 is about 57109.8954385315. The cubic root of 3261540157 is about 1482.9991770063. Note that the first 3 decimals are identical.

The spelling of 3261540157 in words is "three billion, two hundred sixty-one million, five hundred forty thousand, one hundred fifty-seven".