1982372551 has 4 divisors (see below), whose sum is σ = 2002000104. Its totient is φ = 1962745000.

The previous prime is 1982372519. The next prime is 1982372563. The reversal of 1982372551 is 1552732891.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1982372551 - 2⁵ = 1982372519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1982372498 and 1982372507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1982372351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9813625 + ... + 9813826.

It is an arithmetic number, because the mean of its divisors is an integer number (500500026).

Almost surely, 2^1982372551 is an apocalyptic number.

1982372551 is a deficient number, since it is larger than the sum of its proper divisors (19627553).

1982372551 is a wasteful number, since it uses less digits than its factorization.

1982372551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19627552.

The product of its digits is 151200, while the sum is 43.

The square root of 1982372551 is about 44523.8425003952. The cubic root of 1982372551 is about 1256.2085892276.

The spelling of 1982372551 in words is "one billion, nine hundred eighty-two million, three hundred seventy-two thousand, five hundred fifty-one".