354021431 has 2 divisors, whose sum is σ = 354021432. Its totient is φ = 354021430.

The previous prime is 354021419. The next prime is 354021449. The reversal of 354021431 is 134120453.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-354021431 is a prime.

It is a super-2 number, since 2×354021431² = 250662347214575522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 354021397 and 354021406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (354021401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177010715 + 177010716.

It is an arithmetic number, because the mean of its divisors is an integer number (177010716).

Almost surely, 2^354021431 is an apocalyptic number.

354021431 is a deficient number, since it is larger than the sum of its proper divisors (1).

354021431 is an equidigital number, since it uses as much as digits as its factorization.

354021431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 354021431 is about 18815.4572360068. The cubic root of 354021431 is about 707.4186705366.

Adding to 354021431 its reverse (134120453), we get a palindrome (488141884).

The spelling of 354021431 in words is "three hundred fifty-four million, twenty-one thousand, four hundred thirty-one".