7321406551 has 8 divisors (see below), whose sum is σ = 7394241920. Its totient is φ = 7248605112.

The previous prime is 7321406539. The next prime is 7321406563. The reversal of 7321406551 is 1556041237.

It is an interprime number because it is at equal distance from previous prime (7321406539) and next prime (7321406563).

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

It is a cyclic number.

It is not a de Polignac number, because 7321406551 - 2⁷ = 7321406423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7321406581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 862936 + ... + 871378.

It is an arithmetic number, because the mean of its divisors is an integer number (924280240).

Almost surely, 2^7321406551 is an apocalyptic number.

7321406551 is a deficient number, since it is larger than the sum of its proper divisors (72835369).

7321406551 is a wasteful number, since it uses less digits than its factorization.

7321406551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16965.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 7321406551 is about 85565.2181146054. The cubic root of 7321406551 is about 1941.7717324061.

Adding to 7321406551 its reverse (1556041237), we get a palindrome (8877447788).

The spelling of 7321406551 in words is "seven billion, three hundred twenty-one million, four hundred six thousand, five hundred fifty-one".