2156061254 has 8 divisors (see below), whose sum is σ = 3234289608. Its totient is φ = 1077964720.

The previous prime is 2156061247. The next prime is 2156061293. The reversal of 2156061254 is 4521606512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2156061254.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42389 + ... + 78159.

It is an arithmetic number, because the mean of its divisors is an integer number (404286201).

Almost surely, 2^2156061254 is an apocalyptic number.

2156061254 is a deficient number, since it is larger than the sum of its proper divisors (1078228354).

2156061254 is a wasteful number, since it uses less digits than its factorization.

2156061254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65910.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 2156061254 is about 46433.4066594300. The cubic root of 2156061254 is about 1291.8746164112.

Adding to 2156061254 its reverse (4521606512), we get a palindrome (6677667766).

The spelling of 2156061254 in words is "two billion, one hundred fifty-six million, sixty-one thousand, two hundred fifty-four".