2150400181 has 2 divisors, whose sum is σ = 2150400182. Its totient is φ = 2150400180.

The previous prime is 2150400137. The next prime is 2150400209. The reversal of 2150400181 is 1810040512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1775358225 + 375041956 = 42135^2 + 19366^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2150400181 is a prime.

It is a super-2 number, since 2×2150400181² = 9248441876889665522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2150400781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1075200090 + 1075200091.

It is an arithmetic number, because the mean of its divisors is an integer number (1075200091).

Almost surely, 2^2150400181 is an apocalyptic number.

It is an amenable number.

2150400181 is a deficient number, since it is larger than the sum of its proper divisors (1).

2150400181 is an equidigital number, since it uses as much as digits as its factorization.

2150400181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 2150400181 is about 46372.4075393978. The cubic root of 2150400181 is about 1290.7429530337.

Adding to 2150400181 its reverse (1810040512), we get a palindrome (3960440693).

The spelling of 2150400181 in words is "two billion, one hundred fifty million, four hundred thousand, one hundred eighty-one".