15520455 has 24 divisors (see below), whose sum is σ = 27012960. Its totient is φ = 8243520.

The previous prime is 15520447. The next prime is 15520459. The reversal of 15520455 is 55402551.

It is not a de Polignac number, because 15520455 - 2³ = 15520447 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15520459) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13441 + ... + 14549.

It is an arithmetic number, because the mean of its divisors is an integer number (1125540).

Almost surely, 2^15520455 is an apocalyptic number.

15520455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15520455 is a deficient number, since it is larger than the sum of its proper divisors (11492505).

15520455 is a wasteful number, since it uses less digits than its factorization.

15520455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1431 (or 1428 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The square root of 15520455 is about 3939.6008681083. The cubic root of 15520455 is about 249.4411784714.

The spelling of 15520455 in words is "fifteen million, five hundred twenty thousand, four hundred fifty-five".