400516541 has 2 divisors, whose sum is σ = 400516542. Its totient is φ = 400516540.

The previous prime is 400516537. The next prime is 400516573. The reversal of 400516541 is 145615004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 232684516 + 167832025 = 15254^2 + 12955^2 .

It is a cyclic number.

It is not a de Polignac number, because 400516541 - 2² = 400516537 is a prime.

It is a super-2 number, since 2×400516541² = 320826999229209362, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 400516541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400516841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200258270 + 200258271.

It is an arithmetic number, because the mean of its divisors is an integer number (200258271).

Almost surely, 2^400516541 is an apocalyptic number.

It is an amenable number.

400516541 is a deficient number, since it is larger than the sum of its proper divisors (1).

400516541 is an equidigital number, since it uses as much as digits as its factorization.

400516541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 400516541 is about 20012.9093587114. The cubic root of 400516541 is about 737.1233221904.

The spelling of 400516541 in words is "four hundred million, five hundred sixteen thousand, five hundred forty-one".