7251630442 has 12 divisors (see below), whose sum is σ = 12653355330. Its totient is φ = 3107841576.

The previous prime is 7251630439. The next prime is 7251630461. The reversal of 7251630442 is 2440361527.

It can be written as a sum of positive squares in only one way, i.e., 7241839801 + 9790641 = 85099^2 + 3129^2 .

It is a super-2 number, since 2×7251630442² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7251630398 and 7251630407.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36998017 + ... + 36998212.

Almost surely, 2^7251630442 is an apocalyptic number.

7251630442 is a deficient number, since it is larger than the sum of its proper divisors (5401724888).

7251630442 is a wasteful number, since it uses less digits than its factorization.

7251630442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73996245 (or 73996238 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 7251630442 is about 85156.5055764972. The cubic root of 7251630442 is about 1935.5833954128.

Adding to 7251630442 its reverse (2440361527), we get a palindrome (9691991969).

The spelling of 7251630442 in words is "seven billion, two hundred fifty-one million, six hundred thirty thousand, four hundred forty-two".