15505950 has 48 divisors (see below), whose sum is σ = 38747520. Its totient is φ = 4103520.

The previous prime is 15505949. The next prime is 15505951. The reversal of 15505950 is 5950551.

It is an interprime number because it is at equal distance from previous prime (15505949) and next prime (15505951).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15505951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24741 + ... + 25359.

It is an arithmetic number, because the mean of its divisors is an integer number (807240).

Almost surely, 2^15505950 is an apocalyptic number.

15505950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 15505950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19373760).

15505950 is an abundant number, since it is smaller than the sum of its proper divisors (23241570).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15505950 is a wasteful number, since it uses less digits than its factorization.

15505950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801 (or 796 counting only the distinct ones).

The product of its (nonzero) digits is 5625, while the sum is 30.

The square root of 15505950 is about 3937.7595152574. The cubic root of 15505950 is about 249.3634472447.

The spelling of 15505950 in words is "fifteen million, five hundred five thousand, nine hundred fifty".