215422431 has 8 divisors (see below), whose sum is σ = 328262784. Its totient is φ = 123098520.

The previous prime is 215422421. The next prime is 215422447. The reversal of 215422431 is 134224512.

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

It is not a de Polignac number, because 215422431 - 2⁶ = 215422367 is a prime.

It is a super-2 number, since 2×215422431² = 92813647555899522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215422421) 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, 5129085 + ... + 5129126.

It is an arithmetic number, because the mean of its divisors is an integer number (41032848).

Almost surely, 2^215422431 is an apocalyptic number.

215422431 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

215422431 is a deficient number, since it is larger than the sum of its proper divisors (112840353).

215422431 is a wasteful number, since it uses less digits than its factorization.

215422431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10258221.

The product of its digits is 1920, while the sum is 24.

The square root of 215422431 is about 14677.2760074886. The cubic root of 215422431 is about 599.4647365192.

Adding to 215422431 its reverse (134224512), we get a palindrome (349646943).

The spelling of 215422431 in words is "two hundred fifteen million, four hundred twenty-two thousand, four hundred thirty-one".