73400551 has 12 divisors (see below), whose sum is σ = 85260432. Its totient is φ = 61889184.

The previous prime is 73400549. The next prime is 73400557. The reversal of 73400551 is 15500437.

It is not a de Polignac number, because 73400551 - 2¹ = 73400549 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 (73400557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 193480 + ... + 193858.

It is an arithmetic number, because the mean of its divisors is an integer number (7105036).

Almost surely, 2^73400551 is an apocalyptic number.

73400551 is a deficient number, since it is larger than the sum of its proper divisors (11859881).

73400551 is an frugal number, since it uses more digits than its factorization.

73400551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838 (or 459 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 73400551 is about 8567.4121530366. The cubic root of 73400551 is about 418.6969269338.

Adding to 73400551 its reverse (15500437), we get a palindrome (88900988).

The spelling of 73400551 in words is "seventy-three million, four hundred thousand, five hundred fifty-one".