2167207540 has 12 divisors (see below), whose sum is σ = 4551135876. Its totient is φ = 866883008.

The previous prime is 2167207531. The next prime is 2167207547. The reversal of 2167207540 is 457027612.

It can be written as a sum of positive squares in 2 ways, for example, as 1249481104 + 917726436 = 35348^2 + 30294^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2167207496 and 2167207505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2167207547) 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, 54180169 + ... + 54180208.

It is an arithmetic number, because the mean of its divisors is an integer number (379261323).

Almost surely, 2^2167207540 is an apocalyptic number.

2167207540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2167207540 is an abundant number, since it is smaller than the sum of its proper divisors (2383928336).

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

2167207540 is a wasteful number, since it uses less digits than its factorization.

2167207540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108360386 (or 108360384 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 2167207540 is about 46553.2763616053. The cubic root of 2167207540 is about 1294.0970116633.

The spelling of 2167207540 in words is "two billion, one hundred sixty-seven million, two hundred seven thousand, five hundred forty".