2145145140 has 96 divisors (see below), whose sum is σ = 6963989760. Its totient is φ = 547164288.

The previous prime is 2145145063. The next prime is 2145145151. The reversal of 2145145140 is 415415412.

2145145140 is a `hidden beast` number, since 2 + 1 + 4 + 514 + 5 + 140 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73939 + ... + 98778.

It is an arithmetic number, because the mean of its divisors is an integer number (72541560).

Almost surely, 2^2145145140 is an apocalyptic number.

2145145140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2145145140 is an abundant number, since it is smaller than the sum of its proper divisors (4818844620).

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

2145145140 is a wasteful number, since it uses less digits than its factorization.

2145145140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172758 (or 172750 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 2145145140 is about 46315.7115890493. The cubic root of 2145145140 is about 1289.6906775928.

The spelling of 2145145140 in words is "two billion, one hundred forty-five million, one hundred forty-five thousand, one hundred forty".