515155531452 has 48 divisors (see below), whose sum is σ = 1276384183200. Its totient is φ = 161154312192.

The previous prime is 515155531441. The next prime is 515155531453. The reversal of 515155531452 is 254135551515.

It is a super-2 number, since 2×515155531452² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515155531453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3546673 + ... + 3689064.

It is an arithmetic number, because the mean of its divisors is an integer number (26591337150).

Almost surely, 2^515155531452 is an apocalyptic number.

It is an amenable number.

515155531452 is an abundant number, since it is smaller than the sum of its proper divisors (761228651748).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

515155531452 is a wasteful number, since it uses less digits than its factorization.

515155531452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7236110 (or 7236108 counting only the distinct ones).

The product of its digits is 375000, while the sum is 42.

The spelling of 515155531452 in words is "five hundred fifteen billion, one hundred fifty-five million, five hundred thirty-one thousand, four hundred fifty-two".