2155297632 has 48 divisors (see below), whose sum is σ = 5852755440. Its totient is φ = 693658112.

The previous prime is 2155297601. The next prime is 2155297633. The reversal of 2155297632 is 2367925512.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155297633) 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, 384303 + ... + 389870.

It is an arithmetic number, because the mean of its divisors is an integer number (121932405).

Almost surely, 2^2155297632 is an apocalyptic number.

It is an amenable number.

2155297632 is an abundant number, since it is smaller than the sum of its proper divisors (3697457808).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2155297632 is a wasteful number, since it uses less digits than its factorization.

2155297632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774215 (or 774207 counting only the distinct ones).

The product of its digits is 226800, while the sum is 42.

The square root of 2155297632 is about 46425.1831660361. The cubic root of 2155297632 is about 1291.7220820364.

The spelling of 2155297632 in words is "two billion, one hundred fifty-five million, two hundred ninety-seven thousand, six hundred thirty-two".