7155631225 has 6 divisors (see below), whose sum is σ = 8872982750. Its totient is φ = 5724504960.

The previous prime is 7155631207. The next prime is 7155631253. The reversal of 7155631225 is 5221365517.

It can be written as a sum of positive squares in 3 ways, for example, as 2308129849 + 4847501376 = 48043^2 + 69624^2 .

It is a de Polignac number, because none of the positive numbers 2^k-7155631225 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 143112600 + ... + 143112649.

Almost surely, 2^7155631225 is an apocalyptic number.

It is an amenable number.

7155631225 is a deficient number, since it is larger than the sum of its proper divisors (1717351525).

7155631225 is a wasteful number, since it uses less digits than its factorization.

7155631225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286225259 (or 286225254 counting only the distinct ones).

The product of its digits is 63000, while the sum is 37.

The square root of 7155631225 is about 84590.9642042222. The cubic root of 7155631225 is about 1927.0041509833.

The spelling of 7155631225 in words is "seven billion, one hundred fifty-five million, six hundred thirty-one thousand, two hundred twenty-five".