406331551 has 4 divisors (see below), whose sum is σ = 407613672. Its totient is φ = 405049432.

The previous prime is 406331531. The next prime is 406331573. The reversal of 406331551 is 155133604.

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 406331551 - 2⁷ = 406331423 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 (406331531) 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, 640585 + ... + 641218.

It is an arithmetic number, because the mean of its divisors is an integer number (101903418).

Almost surely, 2^406331551 is an apocalyptic number.

406331551 is a deficient number, since it is larger than the sum of its proper divisors (1282121).

406331551 is a wasteful number, since it uses less digits than its factorization.

406331551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282120.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 406331551 is about 20157.6673005584. The cubic root of 406331551 is about 740.6735716357.

The spelling of 406331551 in words is "four hundred six million, three hundred thirty-one thousand, five hundred fifty-one".