971195153220 has 480 divisors, whose sum is σ = 3451455342720. Its totient is φ = 227128872960.

The previous prime is 971195153197. The next prime is 971195153231. The reversal of 971195153220 is 22351591179.

971195153220 is a `hidden beast` number, since 9 + 7 + 1 + 1 + 95 + 1 + 532 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 31903647 + ... + 31934073.

It is an arithmetic number, because the mean of its divisors is an integer number (7190531964).

Almost surely, 2^971195153220 is an apocalyptic number.

971195153220 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 971195153220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1725727671360).

971195153220 is an abundant number, since it is smaller than the sum of its proper divisors (2480260189500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

971195153220 is a wasteful number, since it uses less digits than its factorization.

971195153220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30545 (or 30534 counting only the distinct ones).

The product of its (nonzero) digits is 170100, while the sum is 45.

The spelling of 971195153220 in words is "nine hundred seventy-one billion, one hundred ninety-five million, one hundred fifty-three thousand, two hundred twenty".