252135025545 has 64 divisors (see below), whose sum is σ = 453662060544. Its totient is φ = 118646035200.

The previous prime is 252135025543. The next prime is 252135025561. The reversal of 252135025545 is 545520531252.

It is not a de Polignac number, because 252135025545 - 2¹ = 252135025543 is a prime.

It is a super-2 number, since 2×252135025545² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (252135025543) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6470370 + ... + 6509220.

It is an arithmetic number, because the mean of its divisors is an integer number (7088469696).

Almost surely, 2^252135025545 is an apocalyptic number.

It is an amenable number.

252135025545 is a deficient number, since it is larger than the sum of its proper divisors (201527034999).

252135025545 is a wasteful number, since it uses less digits than its factorization.

252135025545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40342.

The product of its (nonzero) digits is 300000, while the sum is 39.

Adding to 252135025545 its reverse (545520531252), we get a palindrome (797655556797).

The spelling of 252135025545 in words is "two hundred fifty-two billion, one hundred thirty-five million, twenty-five thousand, five hundred forty-five".