2530021556 has 6 divisors (see below), whose sum is σ = 4427537730. Its totient is φ = 1265010776.

The previous prime is 2530021537. The next prime is 2530021561. The reversal of 2530021556 is 6551200352.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2058436900 + 471584656 = 45370^2 + 21716^2 .

It is a super-2 number, since 2×2530021556² = 12802018147649322272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 316252691 + ... + 316252698.

It is an arithmetic number, because the mean of its divisors is an integer number (737922955).

Almost surely, 2^2530021556 is an apocalyptic number.

It is an amenable number.

2530021556 is a deficient number, since it is larger than the sum of its proper divisors (1897516174).

2530021556 is a wasteful number, since it uses less digits than its factorization.

2530021556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632505393 (or 632505391 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 2530021556 is about 50299.3196375458. The cubic root of 2530021556 is about 1362.6199417011.

The spelling of 2530021556 in words is "two billion, five hundred thirty million, twenty-one thousand, five hundred fifty-six".