915225550 has 12 divisors (see below), whose sum is σ = 1702319616. Its totient is φ = 366090200.

The previous prime is 915225547. The next prime is 915225559. The reversal of 915225550 is 55522519.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (915225559) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9152206 + ... + 9152305.

It is an arithmetic number, because the mean of its divisors is an integer number (141859968).

Almost surely, 2^915225550 is an apocalyptic number.

915225550 is a deficient number, since it is larger than the sum of its proper divisors (787094066).

915225550 is a wasteful number, since it uses less digits than its factorization.

915225550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18304523 (or 18304518 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 34.

The square root of 915225550 is about 30252.6949212793. The cubic root of 915225550 is about 970.9034520304.

The spelling of 915225550 in words is "nine hundred fifteen million, two hundred twenty-five thousand, five hundred fifty".