197421455 has 32 divisors (see below), whose sum is σ = 303367680. Its totient is φ = 119733120.

The previous prime is 197421451. The next prime is 197421461. The reversal of 197421455 is 554124791.

It is not a de Polignac number, because 197421455 - 2² = 197421451 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197421451) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7316 + ... + 21174.

It is an arithmetic number, because the mean of its divisors is an integer number (9480240).

Almost surely, 2^197421455 is an apocalyptic number.

197421455 is a deficient number, since it is larger than the sum of its proper divisors (105946225).

197421455 is a wasteful number, since it uses less digits than its factorization.

197421455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13919.

The product of its digits is 50400, while the sum is 38.

The square root of 197421455 is about 14050.6745389679. The cubic root of 197421455 is about 582.2794316778.

The spelling of 197421455 in words is "one hundred ninety-seven million, four hundred twenty-one thousand, four hundred fifty-five".