1561006051 has 8 divisors (see below), whose sum is σ = 1703217600. Its totient is φ = 1418844840.

The previous prime is 1561006049. The next prime is 1561006091. The reversal of 1561006051 is 1506001651.

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 1561006051 - 2¹ = 1561006049 is a prime.

It is a super-3 number, since 3×1561006051³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1561006091) 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 in 7 ways as a sum of consecutive naturals, for example, 85620 + ... + 102238.

It is an arithmetic number, because the mean of its divisors is an integer number (212902200).

Almost surely, 2^1561006051 is an apocalyptic number.

1561006051 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1561006051 is a deficient number, since it is larger than the sum of its proper divisors (142211549).

1561006051 is a wasteful number, since it uses less digits than its factorization.

1561006051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25169.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 1561006051 is about 39509.5691067367. The cubic root of 1561006051 is about 1160.0272612995.

The spelling of 1561006051 in words is "one billion, five hundred sixty-one million, six thousand, fifty-one".