213099370409551 has 8 divisors (see below), whose sum is σ = 216281314393344. Its totient is φ = 209917466319000.

The previous prime is 213099370409539. The next prime is 213099370409581. The reversal of 213099370409551 is 155904073990312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213099370409551 - 2²¹ = 213099368312399 is a prime.

It is a super-2 number, since 2×213099370409551² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213099370409531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 877416 + ... + 20663218.

It is an arithmetic number, because the mean of its divisors is an integer number (27035164299168).

Almost surely, 2^{213099370409551} is an apocalyptic number.

213099370409551 is a deficient number, since it is larger than the sum of its proper divisors (3181943983793).

213099370409551 is a wasteful number, since it uses less digits than its factorization.

213099370409551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19946621.

The product of its (nonzero) digits is 9185400, while the sum is 58.

The spelling of 213099370409551 in words is "two hundred thirteen trillion, ninety-nine billion, three hundred seventy million, four hundred nine thousand, five hundred fifty-one".