561550451 has 32 divisors (see below), whose sum is σ = 737510400. Its totient is φ = 414564480.

The previous prime is 561550433. The next prime is 561550469. The reversal of 561550451 is 154055165.

It is an interprime number because it is at equal distance from previous prime (561550433) and next prime (561550469).

It is not a de Polignac number, because 561550451 - 2²⁶ = 494441587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561550481) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 191585 + ... + 194493.

It is an arithmetic number, because the mean of its divisors is an integer number (23047200).

Almost surely, 2^561550451 is an apocalyptic number.

561550451 is a deficient number, since it is larger than the sum of its proper divisors (175959949).

561550451 is a wasteful number, since it uses less digits than its factorization.

561550451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3059.

The product of its (nonzero) digits is 15000, while the sum is 32.

The square root of 561550451 is about 23697.0557453874. The cubic root of 561550451 is about 825.0170555397.

The spelling of 561550451 in words is "five hundred sixty-one million, five hundred fifty thousand, four hundred fifty-one".