2155520434 has 8 divisors (see below), whose sum is σ = 3236572800. Its totient is φ = 1076662836.

The previous prime is 2155520413. The next prime is 2155520447. The reversal of 2155520434 is 4340255512.

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

It is a junction number, because it is equal to n+sod(n) for n = 2155520396 and 2155520405.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 546234 + ... + 550165.

It is an arithmetic number, because the mean of its divisors is an integer number (404571600).

Almost surely, 2^2155520434 is an apocalyptic number.

2155520434 is a deficient number, since it is larger than the sum of its proper divisors (1081052366).

2155520434 is a wasteful number, since it uses less digits than its factorization.

2155520434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1097384.

The product of its (nonzero) digits is 24000, while the sum is 31.

The square root of 2155520434 is about 46427.5826852960. The cubic root of 2155520434 is about 1291.7665907148.

Adding to 2155520434 its reverse (4340255512), we get a palindrome (6495775946).

The spelling of 2155520434 in words is "two billion, one hundred fifty-five million, five hundred twenty thousand, four hundred thirty-four".