1131551415 has 48 divisors (see below), whose sum is σ = 2014346880. Its totient is φ = 587266560.

The previous prime is 1131551413. The next prime is 1131551417. The reversal of 1131551415 is 5141551311.

1131551415 is a `hidden beast` number, since 1 + 131 + 5 + 514 + 15 = 666.

1131551415 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1131551413) and next prime (1131551417).

It is not a de Polignac number, because 1131551415 - 2¹ = 1131551413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131551413) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1326129 + ... + 1326981.

It is an arithmetic number, because the mean of its divisors is an integer number (41965560).

Almost surely, 2^1131551415 is an apocalyptic number.

1131551415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1131551415 is a deficient number, since it is larger than the sum of its proper divisors (882795465).

1131551415 is a wasteful number, since it uses less digits than its factorization.

1131551415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1624 (or 1621 counting only the distinct ones).

The product of its digits is 1500, while the sum is 27.

The square root of 1131551415 is about 33638.5406193551. The cubic root of 1131551415 is about 1042.0568929287.

The spelling of 1131551415 in words is "one billion, one hundred thirty-one million, five hundred fifty-one thousand, four hundred fifteen".