3155221036 has 12 divisors (see below), whose sum is σ = 6023603880. Its totient is φ = 1434191360.

The previous prime is 3155221031. The next prime is 3155221037. The reversal of 3155221036 is 6301225513.

It is a junction number, because it is equal to n+sod(n) for n = 3155220995 and 3155221013.

It is not an unprimeable number, because it can be changed into a prime (3155221031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35854741 + ... + 35854828.

It is an arithmetic number, because the mean of its divisors is an integer number (501966990).

Almost surely, 2^3155221036 is an apocalyptic number.

It is an amenable number.

3155221036 is a deficient number, since it is larger than the sum of its proper divisors (2868382844).

3155221036 is a wasteful number, since it uses less digits than its factorization.

3155221036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71709584 (or 71709582 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 3155221036 is about 56171.3542297139. The cubic root of 3155221036 is about 1466.7066562329.

Adding to 3155221036 its reverse (6301225513), we get a palindrome (9456446549).

The spelling of 3155221036 in words is "three billion, one hundred fifty-five million, two hundred twenty-one thousand, thirty-six".