1151511225 has 24 divisors (see below), whose sum is σ = 1955291520. Its totient is φ = 597539520.

The previous prime is 1151511223. The next prime is 1151511227. The reversal of 1151511225 is 5221151511.

It is an interprime number because it is at equal distance from previous prime (1151511223) and next prime (1151511227).

It is not a de Polignac number, because 1151511225 - 2¹ = 1151511223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1151511195 and 1151511204.

It is not an unprimeable number, because it can be changed into a prime (1151511223) 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, 204705 + ... + 210254.

It is an arithmetic number, because the mean of its divisors is an integer number (81470480).

Almost surely, 2^1151511225 is an apocalyptic number.

1151511225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1151511225 is a deficient number, since it is larger than the sum of its proper divisors (803780295).

1151511225 is a wasteful number, since it uses less digits than its factorization.

1151511225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415009 (or 415004 counting only the distinct ones).

The product of its digits is 500, while the sum is 24.

The square root of 1151511225 is about 33933.9243972754. The cubic root of 1151511225 is about 1048.1482782761.

Adding to 1151511225 its reverse (5221151511), we get a palindrome (6372662736).

The spelling of 1151511225 in words is "one billion, one hundred fifty-one million, five hundred eleven thousand, two hundred twenty-five".