400515061 has 8 divisors (see below), whose sum is σ = 402162264. Its totient is φ = 398872320.

The previous prime is 400515043. The next prime is 400515107. The reversal of 400515061 is 160515004.

It can be written as a sum of positive squares in 4 ways, for example, as 110460100 + 290054961 = 10510^2 + 17031^2 .

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 400515061 - 2²³ = 392126453 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 (400515001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 469111 + ... + 469963.

It is an arithmetic number, because the mean of its divisors is an integer number (50270283).

Almost surely, 2^400515061 is an apocalyptic number.

It is an amenable number.

400515061 is a deficient number, since it is larger than the sum of its proper divisors (1647203).

400515061 is an equidigital number, since it uses as much as digits as its factorization.

400515061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2231.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 400515061 is about 20012.8723825442. The cubic root of 400515061 is about 737.1224142429.

The spelling of 400515061 in words is "four hundred million, five hundred fifteen thousand, sixty-one".