423161551 has 4 divisors (see below), whose sum is σ = 424808352. Its totient is φ = 421514752.

The previous prime is 423161527. The next prime is 423161573. The reversal of 423161551 is 155161324.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 423161551 - 2¹³ = 423153359 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 (423161251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 823015 + ... + 823528.

It is an arithmetic number, because the mean of its divisors is an integer number (106202088).

Almost surely, 2^423161551 is an apocalyptic number.

423161551 is a deficient number, since it is larger than the sum of its proper divisors (1646801).

423161551 is a wasteful number, since it uses less digits than its factorization.

423161551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1646800.

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

The square root of 423161551 is about 20570.8908654924. The cubic root of 423161551 is about 750.7616268967.

The spelling of 423161551 in words is "four hundred twenty-three million, one hundred sixty-one thousand, five hundred fifty-one".