421131655 has 8 divisors (see below), whose sum is σ = 577552032. Its totient is φ = 288775968.

The previous prime is 421131593. The next prime is 421131661. The reversal of 421131655 is 556131124.

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 421131655 - 2¹¹ = 421129607 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, 6016132 + ... + 6016201.

It is an arithmetic number, because the mean of its divisors is an integer number (72194004).

Almost surely, 2^421131655 is an apocalyptic number.

421131655 is a deficient number, since it is larger than the sum of its proper divisors (156420377).

421131655 is a wasteful number, since it uses less digits than its factorization.

421131655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12032345.

The product of its digits is 3600, while the sum is 28.

The square root of 421131655 is about 20521.4925139474. The cubic root of 421131655 is about 749.5592402845.

Adding to 421131655 its reverse (556131124), we get a palindrome (977262779).

The spelling of 421131655 in words is "four hundred twenty-one million, one hundred thirty-one thousand, six hundred fifty-five".