551399249 has 4 divisors (see below), whose sum is σ = 551447040. Its totient is φ = 551351460.

The previous prime is 551399221. The next prime is 551399269. The reversal of 551399249 is 942993155.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551399249 is a prime.

It is a super-2 number, since 2×551399249² = 608082263595528002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551399269) 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, 5312 + ... + 33630.

It is an arithmetic number, because the mean of its divisors is an integer number (137861760).

Almost surely, 2^551399249 is an apocalyptic number.

It is an amenable number.

551399249 is a deficient number, since it is larger than the sum of its proper divisors (47791).

551399249 is a wasteful number, since it uses less digits than its factorization.

551399249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47790.

The product of its digits is 437400, while the sum is 47.

The square root of 551399249 is about 23481.8919382574. The cubic root of 551399249 is about 820.0154909824.

The spelling of 551399249 in words is "five hundred fifty-one million, three hundred ninety-nine thousand, two hundred forty-nine".