655213001 has 2 divisors, whose sum is σ = 655213002. Its totient is φ = 655213000.

The previous prime is 655212959. The next prime is 655213051. The reversal of 655213001 is 100312556.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 608904976 + 46308025 = 24676^2 + 6805^2 .

It is a cyclic number.

It is not a de Polignac number, because 655213001 - 2¹⁴ = 655196617 is a prime.

It is not a weakly prime, because it can be changed into another prime (655213051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327606500 + 327606501.

It is an arithmetic number, because the mean of its divisors is an integer number (327606501).

Almost surely, 2^655213001 is an apocalyptic number.

It is an amenable number.

655213001 is a deficient number, since it is larger than the sum of its proper divisors (1).

655213001 is an equidigital number, since it uses as much as digits as its factorization.

655213001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 655213001 is about 25597.1287647658. The cubic root of 655213001 is about 868.5486883337.

Adding to 655213001 its reverse (100312556), we get a palindrome (755525557).

The spelling of 655213001 in words is "six hundred fifty-five million, two hundred thirteen thousand, one".