251155135020441 has 16 divisors (see below), whose sum is σ = 335083854283776. Its totient is φ = 167331609219456.

The previous prime is 251155135020431. The next prime is 251155135020467. The reversal of 251155135020441 is 144020531551152.

It is not a de Polignac number, because 251155135020441 - 2¹⁷ = 251155134889369 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 251155135020441.

It is not an unprimeable number, because it can be changed into a prime (251155135020431) 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, 40876861 + ... + 46617893.

It is an arithmetic number, because the mean of its divisors is an integer number (20942740892736).

Almost surely, 2^{251155135020441} is an apocalyptic number.

It is an amenable number.

251155135020441 is a deficient number, since it is larger than the sum of its proper divisors (83928719263335).

251155135020441 is a wasteful number, since it uses less digits than its factorization.

251155135020441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5750192.

The product of its (nonzero) digits is 120000, while the sum is 39.

Adding to 251155135020441 its reverse (144020531551152), we get a palindrome (395175666571593).

The spelling of 251155135020441 in words is "two hundred fifty-one trillion, one hundred fifty-five billion, one hundred thirty-five million, twenty thousand, four hundred forty-one".