215455431 has 8 divisors (see below), whose sum is σ = 287440624. Its totient is φ = 143553600.

The previous prime is 215455381. The next prime is 215455447. The reversal of 215455431 is 134554512.

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

It is not a de Polignac number, because 215455431 - 2⁶ = 215455367 is a prime.

It is a super-2 number, since 2×215455431² = 92842085494791522, which 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 (215455481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14536 + ... + 25341.

It is an arithmetic number, because the mean of its divisors is an integer number (35930078).

Almost surely, 2^215455431 is an apocalyptic number.

215455431 is a deficient number, since it is larger than the sum of its proper divisors (71985193).

215455431 is a wasteful number, since it uses less digits than its factorization.

215455431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41681.

The product of its digits is 12000, while the sum is 30.

The square root of 215455431 is about 14678.4001512426. The cubic root of 215455431 is about 599.4953451025.

The spelling of 215455431 in words is "two hundred fifteen million, four hundred fifty-five thousand, four hundred thirty-one".