915521948 has 12 divisors (see below), whose sum is σ = 1747814712. Its totient is φ = 416146320.

The previous prime is 915521921. The next prime is 915521953. The reversal of 915521948 is 849125519.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 20807317 = 915521948 / (9 + 1 + 5 + 5 + 2 + 1 + 9 + 4 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 915521899 and 915521908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10403615 + ... + 10403702.

It is an arithmetic number, because the mean of its divisors is an integer number (145651226).

Almost surely, 2^915521948 is an apocalyptic number.

It is an amenable number.

915521948 is a deficient number, since it is larger than the sum of its proper divisors (832292764).

915521948 is a wasteful number, since it uses less digits than its factorization.

915521948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20807332 (or 20807330 counting only the distinct ones).

The product of its digits is 129600, while the sum is 44.

The square root of 915521948 is about 30257.5932288079. The cubic root of 915521948 is about 971.0082505257.

The spelling of 915521948 in words is "nine hundred fifteen million, five hundred twenty-one thousand, nine hundred forty-eight".