2550032781 has 4 divisors (see below), whose sum is σ = 3400043712. Its totient is φ = 1700021852.

The previous prime is 2550032773. The next prime is 2550032789. The reversal of 2550032781 is 1872300552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (2550032773) and next prime (2550032789).

It is a cyclic number.

It is not a de Polignac number, because 2550032781 - 2³ = 2550032773 is a prime.

It is a super-2 number, since 2×2550032781² = 13005334368349187922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2550032789) 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, 425005461 + ... + 425005466.

It is an arithmetic number, because the mean of its divisors is an integer number (850010928).

Almost surely, 2^2550032781 is an apocalyptic number.

It is an amenable number.

2550032781 is a deficient number, since it is larger than the sum of its proper divisors (850010931).

2550032781 is an equidigital number, since it uses as much as digits as its factorization.

2550032781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850010930.

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 2550032781 is about 50497.8492710333. The cubic root of 2550032781 is about 1366.2030623111.

The spelling of 2550032781 in words is "two billion, five hundred fifty million, thirty-two thousand, seven hundred eighty-one".