356222861 has 2 divisors, whose sum is σ = 356222862. Its totient is φ = 356222860.

The previous prime is 356222837. The next prime is 356222899. The reversal of 356222861 is 168222653.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 352725961 + 3496900 = 18781^2 + 1870^2 .

It is an emirp because it is prime and its reverse (168222653) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-356222861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (356222561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 178111430 + 178111431.

It is an arithmetic number, because the mean of its divisors is an integer number (178111431).

Almost surely, 2^356222861 is an apocalyptic number.

It is an amenable number.

356222861 is a deficient number, since it is larger than the sum of its proper divisors (1).

356222861 is an equidigital number, since it uses as much as digits as its factorization.

356222861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 35.

The square root of 356222861 is about 18873.8671448116. The cubic root of 356222861 is about 708.8819678014.

It can be divided in two parts, 35622 and 2861, that added together give a palindrome (38483).

The spelling of 356222861 in words is "three hundred fifty-six million, two hundred twenty-two thousand, eight hundred sixty-one".