2158923550 has 24 divisors (see below), whose sum is σ = 4589255376. Its totient is φ = 740202240.

The previous prime is 2158923509. The next prime is 2158923553. The reversal of 2158923550 is 553298512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2158923553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3083827 + ... + 3084526.

It is an arithmetic number, because the mean of its divisors is an integer number (191218974).

Almost surely, 2^2158923550 is an apocalyptic number.

2158923550 is an abundant number, since it is smaller than the sum of its proper divisors (2430331826).

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

2158923550 is a wasteful number, since it uses less digits than its factorization.

2158923550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6168372 (or 6168367 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 40.

The square root of 2158923550 is about 46464.2179531734. The cubic root of 2158923550 is about 1292.4460430393.

The spelling of 2158923550 in words is "two billion, one hundred fifty-eight million, nine hundred twenty-three thousand, five hundred fifty".