997551455 has 8 divisors (see below), whose sum is σ = 1198876704. Its totient is φ = 796831200.

The previous prime is 997551421. The next prime is 997551463. The reversal of 997551455 is 554155799.

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

It is not a de Polignac number, because 997551455 - 2⁶ = 997551391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147611 + ... + 154220.

It is an arithmetic number, because the mean of its divisors is an integer number (149859588).

Almost surely, 2^997551455 is an apocalyptic number.

997551455 is a deficient number, since it is larger than the sum of its proper divisors (201325249).

997551455 is a wasteful number, since it uses less digits than its factorization.

997551455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302497.

The product of its digits is 1417500, while the sum is 50.

The square root of 997551455 is about 31584.0379780673. The cubic root of 997551455 is about 999.1831512732.

The spelling of 997551455 in words is "nine hundred ninety-seven million, five hundred fifty-one thousand, four hundred fifty-five".