1921672275 has 24 divisors (see below), whose sum is σ = 3179205744. Its totient is φ = 1024233600.

The previous prime is 1921672273. The next prime is 1921672301. The reversal of 1921672275 is 5722761291.

It is not a de Polignac number, because 1921672275 - 2¹ = 1921672273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1921672271) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 123217 + ... + 137933.

It is an arithmetic number, because the mean of its divisors is an integer number (132466906).

Almost surely, 2^1921672275 is an apocalyptic number.

1921672275 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1921672275 is a deficient number, since it is larger than the sum of its proper divisors (1257533469).

1921672275 is a wasteful number, since it uses less digits than its factorization.

1921672275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16471 (or 16466 counting only the distinct ones).

The product of its digits is 105840, while the sum is 42.

The square root of 1921672275 is about 43836.8825876111. The cubic root of 1921672275 is about 1243.2537412284.

The spelling of 1921672275 in words is "one billion, nine hundred twenty-one million, six hundred seventy-two thousand, two hundred seventy-five".