355403431 has 2 divisors, whose sum is σ = 355403432. Its totient is φ = 355403430.

The previous prime is 355403387. The next prime is 355403459. The reversal of 355403431 is 134304553.

It is an a-pointer prime, because the next prime (355403459) can be obtained adding 355403431 to its sum of digits (28).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 355403431 - 2⁹ = 355402919 is a prime.

It is a super-2 number, since 2×355403431² = 252623197533143522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 355403431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (355403491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177701715 + 177701716.

It is an arithmetic number, because the mean of its divisors is an integer number (177701716).

Almost surely, 2^355403431 is an apocalyptic number.

355403431 is a deficient number, since it is larger than the sum of its proper divisors (1).

355403431 is an equidigital number, since it uses as much as digits as its factorization.

355403431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 28.

The square root of 355403431 is about 18852.1465886514. The cubic root of 355403431 is about 708.3379964199.

Adding to 355403431 its reverse (134304553), we get a palindrome (489707984).

The spelling of 355403431 in words is "three hundred fifty-five million, four hundred three thousand, four hundred thirty-one".