2155361286 has 32 divisors (see below), whose sum is σ = 4915397088. Its totient is φ = 624176640.

The previous prime is 2155361249. The next prime is 2155361321. The reversal of 2155361286 is 6821635512.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 811405 + ... + 814056.

It is an arithmetic number, because the mean of its divisors is an integer number (153606159).

Almost surely, 2^2155361286 is an apocalyptic number.

2155361286 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2155361286 is an abundant number, since it is smaller than the sum of its proper divisors (2760035802).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2155361286 is a wasteful number, since it uses less digits than its factorization.

2155361286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1625496.

The product of its digits is 86400, while the sum is 39.

The square root of 2155361286 is about 46425.8687156202. The cubic root of 2155361286 is about 1291.7347983727.

Adding to 2155361286 its reverse (6821635512), we get a palindrome (8976996798).

The spelling of 2155361286 in words is "two billion, one hundred fifty-five million, three hundred sixty-one thousand, two hundred eighty-six".