2155541031251 has 16 divisors (see below), whose sum is σ = 2218310115840. Its totient is φ = 2093526361440.

The previous prime is 2155541031209. The next prime is 2155541031257. The reversal of 2155541031251 is 1521301455512.

It is a cyclic number.

It is not a de Polignac number, because 2155541031251 - 2¹⁴ = 2155541014867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2155541031257) 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, 3701480 + ... + 4244058.

It is an arithmetic number, because the mean of its divisors is an integer number (138644382240).

Almost surely, 2^{2155541031251} is an apocalyptic number.

2155541031251 is a deficient number, since it is larger than the sum of its proper divisors (62769084589).

2155541031251 is a wasteful number, since it uses less digits than its factorization.

2155541031251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543274.

The product of its (nonzero) digits is 30000, while the sum is 35.

Adding to 2155541031251 its reverse (1521301455512), we get a palindrome (3676842486763).

The spelling of 2155541031251 in words is "two trillion, one hundred fifty-five billion, five hundred forty-one million, thirty-one thousand, two hundred fifty-one".