20151256141 has 2 divisors, whose sum is σ = 20151256142. Its totient is φ = 20151256140.

The previous prime is 20151256127. The next prime is 20151256159. The reversal of 20151256141 is 14165215102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18570875625 + 1580380516 = 136275^2 + 39754^2 .

It is a cyclic number.

It is not a de Polignac number, because 20151256141 - 2⁹ = 20151255629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20151256171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10075628070 + 10075628071.

It is an arithmetic number, because the mean of its divisors is an integer number (10075628071).

Almost surely, 2^20151256141 is an apocalyptic number.

It is an amenable number.

20151256141 is a deficient number, since it is larger than the sum of its proper divisors (1).

20151256141 is an equidigital number, since it uses as much as digits as its factorization.

20151256141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 28.

The spelling of 20151256141 in words is "twenty billion, one hundred fifty-one million, two hundred fifty-six thousand, one hundred forty-one".