1625253551 has 2 divisors, whose sum is σ = 1625253552. Its totient is φ = 1625253550.

The previous prime is 1625253503. The next prime is 1625253569. The reversal of 1625253551 is 1553525261.

It is a strong prime.

It is an emirp because it is prime and its reverse (1553525261) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1625253551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1625253451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 812626775 + 812626776.

It is an arithmetic number, because the mean of its divisors is an integer number (812626776).

Almost surely, 2^1625253551 is an apocalyptic number.

1625253551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1625253551 is an equidigital number, since it uses as much as digits as its factorization.

1625253551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45000, while the sum is 35.

The square root of 1625253551 is about 40314.4335319250. The cubic root of 1625253551 is about 1175.7284876815.

The spelling of 1625253551 in words is "one billion, six hundred twenty-five million, two hundred fifty-three thousand, five hundred fifty-one".