1561213414 has 4 divisors (see below), whose sum is σ = 2341820124. Its totient is φ = 780606706.

The previous prime is 1561213403. The next prime is 1561213417. The reversal of 1561213414 is 4143121651.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561213417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390303352 + ... + 390303355.

It is an arithmetic number, because the mean of its divisors is an integer number (585455031).

Almost surely, 2^1561213414 is an apocalyptic number.

1561213414 is a deficient number, since it is larger than the sum of its proper divisors (780606710).

1561213414 is an equidigital number, since it uses as much as digits as its factorization.

1561213414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780606709.

The product of its digits is 2880, while the sum is 28.

The square root of 1561213414 is about 39512.1932319632. The cubic root of 1561213414 is about 1160.0786247737.

The spelling of 1561213414 in words is "one billion, five hundred sixty-one million, two hundred thirteen thousand, four hundred fourteen".