2158953481 has 2 divisors, whose sum is σ = 2158953482. Its totient is φ = 2158953480.

The previous prime is 2158953473. The next prime is 2158953487. The reversal of 2158953481 is 1843598512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1763580025 + 395373456 = 41995^2 + 19884^2 .

It is a cyclic number.

It is not a de Polignac number, because 2158953481 - 2³ = 2158953473 is a prime.

It is a super-2 number, since 2×2158953481² = 9322160266244034722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2158953487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1079476740 + 1079476741.

It is an arithmetic number, because the mean of its divisors is an integer number (1079476741).

Almost surely, 2^2158953481 is an apocalyptic number.

It is an amenable number.

2158953481 is a deficient number, since it is larger than the sum of its proper divisors (1).

2158953481 is an equidigital number, since it uses as much as digits as its factorization.

2158953481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 345600, while the sum is 46.

The square root of 2158953481 is about 46464.5400386144. The cubic root of 2158953481 is about 1292.4520157726.

The spelling of 2158953481 in words is "two billion, one hundred fifty-eight million, nine hundred fifty-three thousand, four hundred eighty-one".