8215129401 has 8 divisors (see below), whose sum is σ = 10955102400. Its totient is φ = 5475954672.

The previous prime is 8215129361. The next prime is 8215129469. The reversal of 8215129401 is 1049215128.

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

It is not a de Polignac number, because 8215129401 - 2¹⁴ = 8215113017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8215129801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175126 + ... + 217023.

It is an arithmetic number, because the mean of its divisors is an integer number (1369387800).

Almost surely, 2^8215129401 is an apocalyptic number.

It is an amenable number.

8215129401 is a deficient number, since it is larger than the sum of its proper divisors (2739972999).

8215129401 is a wasteful number, since it uses less digits than its factorization.

8215129401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399135.

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 8215129401 is about 90637.3510259429. The cubic root of 8215129401 is about 2017.7691118779.

The spelling of 8215129401 in words is "eight billion, two hundred fifteen million, one hundred twenty-nine thousand, four hundred one".