2156061253 has 16 divisors (see below), whose sum is σ = 2276107776. Its totient is φ = 2039469120.

The previous prime is 2156061247. The next prime is 2156061293. The reversal of 2156061253 is 3521606512.

It is a cyclic number.

It is not a de Polignac number, because 2156061253 - 2⁹ = 2156060741 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156061293) 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, 462651 + ... + 467287.

It is an arithmetic number, because the mean of its divisors is an integer number (142256736).

Almost surely, 2^2156061253 is an apocalyptic number.

It is an amenable number.

2156061253 is a deficient number, since it is larger than the sum of its proper divisors (120046523).

2156061253 is a wasteful number, since it uses less digits than its factorization.

2156061253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5004.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 2156061253 is about 46433.4066486619. The cubic root of 2156061253 is about 1291.8746162115.

Adding to 2156061253 its reverse (3521606512), we get a palindrome (5677667765).

The spelling of 2156061253 in words is "two billion, one hundred fifty-six million, sixty-one thousand, two hundred fifty-three".