2155240511 has 2 divisors, whose sum is σ = 2155240512. Its totient is φ = 2155240510.

The previous prime is 2155240489. The next prime is 2155240543. The reversal of 2155240511 is 1150425512.

2155240511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2155240511 is a prime.

It is a super-2 number, since 2×2155240511² = 9290123320511082242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2155240211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077620255 + 1077620256.

It is an arithmetic number, because the mean of its divisors is an integer number (1077620256).

Almost surely, 2^2155240511 is an apocalyptic number.

2155240511 is a deficient number, since it is larger than the sum of its proper divisors (1).

2155240511 is an equidigital number, since it uses as much as digits as its factorization.

2155240511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 2155240511 is about 46424.5679678336. The cubic root of 2155240511 is about 1291.7106706026.

The spelling of 2155240511 in words is "two billion, one hundred fifty-five million, two hundred forty thousand, five hundred eleven".