215900029651 has 2 divisors, whose sum is σ = 215900029652. Its totient is φ = 215900029650.

The previous prime is 215900029649. The next prime is 215900029673. The reversal of 215900029651 is 156920009512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 215900029651 - 2¹ = 215900029649 is a prime.

It is a super-2 number, since 2×215900029651² (a number of 23 digits) contains 22 as substring.

Together with 215900029649, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (215900429651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107950014825 + 107950014826.

It is an arithmetic number, because the mean of its divisors is an integer number (107950014826).

Almost surely, 2^215900029651 is an apocalyptic number.

215900029651 is a deficient number, since it is larger than the sum of its proper divisors (1).

215900029651 is an equidigital number, since it uses as much as digits as its factorization.

215900029651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48600, while the sum is 40.

The spelling of 215900029651 in words is "two hundred fifteen billion, nine hundred million, twenty-nine thousand, six hundred fifty-one".