3157255474621 has 2 divisors, whose sum is σ = 3157255474622. Its totient is φ = 3157255474620.

The previous prime is 3157255474589. The next prime is 3157255474651. The reversal of 3157255474621 is 1264745527513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1752115505625 + 1405139968996 = 1323675^2 + 1185386^2 .

It is a cyclic number.

It is not a de Polignac number, because 3157255474621 - 2⁵ = 3157255474589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3157255474651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1578627737310 + 1578627737311.

It is an arithmetic number, because the mean of its divisors is an integer number (1578627737311).

Almost surely, 2^{3157255474621} is an apocalyptic number.

It is an amenable number.

3157255474621 is a deficient number, since it is larger than the sum of its proper divisors (1).

3157255474621 is an equidigital number, since it uses as much as digits as its factorization.

3157255474621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056000, while the sum is 52.

The spelling of 3157255474621 in words is "three trillion, one hundred fifty-seven billion, two hundred fifty-five million, four hundred seventy-four thousand, six hundred twenty-one".