15550601 has 4 divisors (see below), whose sum is σ = 16964304. Its totient is φ = 14136900.

The previous prime is 15550559. The next prime is 15550609. The reversal of 15550601 is 10605551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15550601 is a prime.

It is a super-2 number, since 2×15550601² = 483642382922402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15550609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 706835 + ... + 706856.

It is an arithmetic number, because the mean of its divisors is an integer number (4241076).

Almost surely, 2^15550601 is an apocalyptic number.

15550601 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

15550601 is a deficient number, since it is larger than the sum of its proper divisors (1413703).

15550601 is a wasteful number, since it uses less digits than its factorization.

15550601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1413702.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 15550601 is about 3943.4250341550. The cubic root of 15550601 is about 249.6025738780.

The spelling of 15550601 in words is "fifteen million, five hundred fifty thousand, six hundred one".