405265555531 has 2 divisors, whose sum is σ = 405265555532. Its totient is φ = 405265555530.

The previous prime is 405265555433. The next prime is 405265555537. The reversal of 405265555531 is 135555562504.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 405265555531 - 2¹⁹ = 405265031243 is a prime.

It is a super-2 number, since 2×405265555531² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (405265555537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202632777765 + 202632777766.

It is an arithmetic number, because the mean of its divisors is an integer number (202632777766).

Almost surely, 2^405265555531 is an apocalyptic number.

405265555531 is a deficient number, since it is larger than the sum of its proper divisors (1).

405265555531 is an equidigital number, since it uses as much as digits as its factorization.

405265555531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2250000, while the sum is 46.

The spelling of 405265555531 in words is "four hundred five billion, two hundred sixty-five million, five hundred fifty-five thousand, five hundred thirty-one".