1566150251 has 2 divisors, whose sum is σ = 1566150252. Its totient is φ = 1566150250.

The previous prime is 1566150241. The next prime is 1566150253. The reversal of 1566150251 is 1520516651.

It is a strong prime.

It is an emirp because it is prime and its reverse (1520516651) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1566150251 is a prime.

Together with 1566150253, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1566150253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 783075125 + 783075126.

It is an arithmetic number, because the mean of its divisors is an integer number (783075126).

Almost surely, 2^1566150251 is an apocalyptic number.

1566150251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1566150251 is an equidigital number, since it uses as much as digits as its factorization.

1566150251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9000, while the sum is 32.

The square root of 1566150251 is about 39574.6162457705. The cubic root of 1566150251 is about 1161.3001304059.

The spelling of 1566150251 in words is "one billion, five hundred sixty-six million, one hundred fifty thousand, two hundred fifty-one".