1921339131 has 8 divisors (see below), whose sum is σ = 2562094080. Its totient is φ = 1280738472.

The previous prime is 1921339103. The next prime is 1921339139. The reversal of 1921339131 is 1319331291.

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

It is not a de Polignac number, because 1921339131 - 2⁶ = 1921339067 is a prime.

It is a super-2 number, since 2×1921339131² = 7383088112623670322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1921339092 and 1921339101.

It is not an unprimeable number, because it can be changed into a prime (1921339139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5451 + ... + 62228.

It is an arithmetic number, because the mean of its divisors is an integer number (320261760).

Almost surely, 2^1921339131 is an apocalyptic number.

1921339131 is a deficient number, since it is larger than the sum of its proper divisors (640754949).

1921339131 is an equidigital number, since it uses as much as digits as its factorization.

1921339131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77145.

The product of its digits is 4374, while the sum is 33.

The square root of 1921339131 is about 43833.0826089154. The cubic root of 1921339131 is about 1243.1818929626.

The spelling of 1921339131 in words is "one billion, nine hundred twenty-one million, three hundred thirty-nine thousand, one hundred thirty-one".