521151540452 has 12 divisors (see below), whose sum is σ = 912029746236. Its totient is φ = 260571612960.

The previous prime is 521151540433. The next prime is 521151540479. The reversal of 521151540452 is 254045151125.

It can be written as a sum of positive squares in 2 ways, for example, as 296223301696 + 224928238756 = 544264^2 + 474266^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 748199 + ... + 1265742.

It is an arithmetic number, because the mean of its divisors is an integer number (76002478853).

Almost surely, 2^521151540452 is an apocalyptic number.

It is an amenable number.

521151540452 is a deficient number, since it is larger than the sum of its proper divisors (390878205784).

521151540452 is a wasteful number, since it uses less digits than its factorization.

521151540452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2078638 (or 2078636 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 35.

Adding to 521151540452 its reverse (254045151125), we get a palindrome (775196691577).

The spelling of 521151540452 in words is "five hundred twenty-one billion, one hundred fifty-one million, five hundred forty thousand, four hundred fifty-two".