3021220157 has 2 divisors, whose sum is σ = 3021220158. Its totient is φ = 3021220156.

The previous prime is 3021220133. The next prime is 3021220193. The reversal of 3021220157 is 7510221203.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1516245721 + 1504974436 = 38939^2 + 38794^2 .

It is an emirp because it is prime and its reverse (7510221203) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3021220157 - 2¹² = 3021216061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3021220117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1510610078 + 1510610079.

It is an arithmetic number, because the mean of its divisors is an integer number (1510610079).

Almost surely, 2^3021220157 is an apocalyptic number.

It is an amenable number.

3021220157 is a deficient number, since it is larger than the sum of its proper divisors (1).

3021220157 is an equidigital number, since it uses as much as digits as its factorization.

3021220157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 3021220157 is about 54965.6270500028. The cubic root of 3021220157 is about 1445.6421130614.

The spelling of 3021220157 in words is "three billion, twenty-one million, two hundred twenty thousand, one hundred fifty-seven".