2148157477 has 2 divisors, whose sum is σ = 2148157478. Its totient is φ = 2148157476.

The previous prime is 2148157447. The next prime is 2148157481. The reversal of 2148157477 is 7747518412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1838608641 + 309548836 = 42879^2 + 17594^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2148157477 is a prime.

It is a super-2 number, since 2×2148157477² = 9229161091982011058, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2148157447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1074078738 + 1074078739.

It is an arithmetic number, because the mean of its divisors is an integer number (1074078739).

Almost surely, 2^2148157477 is an apocalyptic number.

It is an amenable number.

2148157477 is a deficient number, since it is larger than the sum of its proper divisors (1).

2148157477 is an equidigital number, since it uses as much as digits as its factorization.

2148157477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 439040, while the sum is 46.

The square root of 2148157477 is about 46348.2197824253. The cubic root of 2148157477 is about 1290.2940813417.

The spelling of 2148157477 in words is "two billion, one hundred forty-eight million, one hundred fifty-seven thousand, four hundred seventy-seven".