7620245531 has 2 divisors, whose sum is σ = 7620245532. Its totient is φ = 7620245530.

The previous prime is 7620245489. The next prime is 7620245533. The reversal of 7620245531 is 1355420267.

It is a strong prime.

It is an emirp because it is prime and its reverse (1355420267) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7620245531 is a prime.

It is a super-2 number, since 2×7620245531² (a number of 21 digits) contains 22 as substring.

Together with 7620245533, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 7620245491 and 7620245500.

It is not a weakly prime, because it can be changed into another prime (7620245533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3810122765 + 3810122766.

It is an arithmetic number, because the mean of its divisors is an integer number (3810122766).

Almost surely, 2^7620245531 is an apocalyptic number.

7620245531 is a deficient number, since it is larger than the sum of its proper divisors (1).

7620245531 is an equidigital number, since it uses as much as digits as its factorization.

7620245531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 7620245531 is about 87294.0177274480. The cubic root of 7620245531 is about 1967.8394146068.

Adding to 7620245531 its reverse (1355420267), we get a palindrome (8975665798).

The spelling of 7620245531 in words is "seven billion, six hundred twenty million, two hundred forty-five thousand, five hundred thirty-one".