40431234002261 has 2 divisors, whose sum is σ = 40431234002262. Its totient is φ = 40431234002260.

The previous prime is 40431234002219. The next prime is 40431234002297. The reversal of 40431234002261 is 16220043213404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20543148327025 + 19888085675236 = 4532455^2 + 4459606^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40431234002261 is a prime.

It is a super-2 number, since 2×40431234002261² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40431234004261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20215617001130 + 20215617001131.

It is an arithmetic number, because the mean of its divisors is an integer number (20215617001131).

Almost surely, 2^{40431234002261} is an apocalyptic number.

It is an amenable number.

40431234002261 is a deficient number, since it is larger than the sum of its proper divisors (1).

40431234002261 is an equidigital number, since it uses as much as digits as its factorization.

40431234002261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 40431234002261 its reverse (16220043213404), we get a palindrome (56651277215665).

The spelling of 40431234002261 in words is "forty trillion, four hundred thirty-one billion, two hundred thirty-four million, two thousand, two hundred sixty-one".