551342401 has 4 divisors (see below), whose sum is σ = 552931632. Its totient is φ = 549753172.

The previous prime is 551342381. The next prime is 551342443. The reversal of 551342401 is 104243155.

It is a happy number.

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 an emirpimes, since its reverse is a distinct semiprime: 104243155 = 5 ⋅20848631.

It is a cyclic number.

It is not a de Polignac number, because 551342401 - 2¹³ = 551334209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551349401) 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, 794095 + ... + 794788.

It is an arithmetic number, because the mean of its divisors is an integer number (138232908).

Almost surely, 2^551342401 is an apocalyptic number.

It is an amenable number.

551342401 is a deficient number, since it is larger than the sum of its proper divisors (1589231).

551342401 is a wasteful number, since it uses less digits than its factorization.

551342401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589230.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 551342401 is about 23480.6814424113. The cubic root of 551342401 is about 819.9873094407.

Adding to 551342401 its reverse (104243155), we get a palindrome (655585556).

The spelling of 551342401 in words is "five hundred fifty-one million, three hundred forty-two thousand, four hundred one".