215256355626 has 32 divisors (see below), whose sum is σ = 463671512640. Its totient is φ = 66226662144.

The previous prime is 215256355621. The next prime is 215256355627. The reversal of 215256355626 is 626553652512.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (215256355621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 771970 + ... + 1013138.

It is an arithmetic number, because the mean of its divisors is an integer number (14489734770).

Almost surely, 2^215256355626 is an apocalyptic number.

215256355626 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

215256355626 is an abundant number, since it is smaller than the sum of its proper divisors (248415157014).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215256355626 is a wasteful number, since it uses less digits than its factorization.

215256355626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252630.

The product of its digits is 3240000, while the sum is 48.

The spelling of 215256355626 in words is "two hundred fifteen billion, two hundred fifty-six million, three hundred fifty-five thousand, six hundred twenty-six".