2541167021 has 8 divisors (see below), whose sum is σ = 2783428920. Its totient is φ = 2309214208.

The previous prime is 2541167017. The next prime is 2541167047. The reversal of 2541167021 is 1207611452.

It can be written as a sum of positive squares in 4 ways, for example, as 1254151396 + 1287015625 = 35414^2 + 35875^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2541167021 - 2² = 2541167017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2541169021) 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, 2576756 + ... + 2577741.

It is an arithmetic number, because the mean of its divisors is an integer number (347928615).

Almost surely, 2^2541167021 is an apocalyptic number.

It is an amenable number.

2541167021 is a deficient number, since it is larger than the sum of its proper divisors (242261899).

2541167021 is a wasteful number, since it uses less digits than its factorization.

2541167021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5154543.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 2541167021 is about 50409.9892977572. The cubic root of 2541167021 is about 1364.6179202275.

Adding to 2541167021 its reverse (1207611452), we get a palindrome (3748778473).

The spelling of 2541167021 in words is "two billion, five hundred forty-one million, one hundred sixty-seven thousand, twenty-one".