551640742 has 8 divisors (see below), whose sum is σ = 837430776. Its totient is φ = 272497152.

The previous prime is 551640731. The next prime is 551640743. The reversal of 551640742 is 247046155.

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

It is a junction number, because it is equal to n+sod(n) for n = 551640698 and 551640707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551640743) 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, 1661403 + ... + 1661734.

It is an arithmetic number, because the mean of its divisors is an integer number (104678847).

Almost surely, 2^551640742 is an apocalyptic number.

551640742 is a deficient number, since it is larger than the sum of its proper divisors (285790034).

551640742 is a wasteful number, since it uses less digits than its factorization.

551640742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3323222.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 551640742 is about 23487.0334865857. The cubic root of 551640742 is about 820.1351859213.

Adding to 551640742 its reverse (247046155), we get a palindrome (798686897).

The spelling of 551640742 in words is "five hundred fifty-one million, six hundred forty thousand, seven hundred forty-two".