213251555420601 has 32 divisors (see below), whose sum is σ = 287697837600768. Its totient is φ = 140494083690240.

The previous prime is 213251555420599. The next prime is 213251555420609. The reversal of 213251555420601 is 106024555152312.

It is a happy number.

It is not a de Polignac number, because 213251555420601 - 2¹ = 213251555420599 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213251555420609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 560539236 + ... + 560919546.

It is an arithmetic number, because the mean of its divisors is an integer number (8990557425024).

Almost surely, 2^{213251555420601} is an apocalyptic number.

It is an amenable number.

213251555420601 is a deficient number, since it is larger than the sum of its proper divisors (74446282180167).

213251555420601 is a wasteful number, since it uses less digits than its factorization.

213251555420601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385301.

The product of its (nonzero) digits is 360000, while the sum is 42.

The spelling of 213251555420601 in words is "two hundred thirteen trillion, two hundred fifty-one billion, five hundred fifty-five million, four hundred twenty thousand, six hundred one".