3155216385 has 32 divisors (see below), whose sum is σ = 5252739840. Its totient is φ = 1615324928.

The previous prime is 3155216381. The next prime is 3155216387. The reversal of 3155216385 is 5836125513.

It is a cyclic number.

It is not a de Polignac number, because 3155216385 - 2² = 3155216381 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3155216381) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54292 + ... + 96218.

It is an arithmetic number, because the mean of its divisors is an integer number (164148120).

Almost surely, 2^3155216385 is an apocalyptic number.

It is an amenable number.

3155216385 is a deficient number, since it is larger than the sum of its proper divisors (2097523455).

3155216385 is a wasteful number, since it uses less digits than its factorization.

3155216385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42137.

The product of its digits is 108000, while the sum is 39.

The square root of 3155216385 is about 56171.3128295930. The cubic root of 3155216385 is about 1466.7059355590.

The spelling of 3155216385 in words is "three billion, one hundred fifty-five million, two hundred sixteen thousand, three hundred eighty-five".