3215012040 has 128 divisors (see below), whose sum is σ = 11280816000. Its totient is φ = 812208384.

The previous prime is 3215011993. The next prime is 3215012041. The reversal of 3215012040 is 402105123.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (3215012041) 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, 57819 + ... + 98858.

It is an arithmetic number, because the mean of its divisors is an integer number (88131375).

Almost surely, 2^3215012040 is an apocalyptic number.

3215012040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3215012040 is an abundant number, since it is smaller than the sum of its proper divisors (8065803960).

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

3215012040 is a wasteful number, since it uses less digits than its factorization.

3215012040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156716 (or 156706 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 3215012040 is about 56701.0761802631. The cubic root of 3215012040 is about 1475.9133731961.

Adding to 3215012040 its reverse (402105123), we get a palindrome (3617117163).

The spelling of 3215012040 in words is "three billion, two hundred fifteen million, twelve thousand, forty".