1971123150 has 24 divisors (see below), whose sum is σ = 4888385784. Its totient is φ = 525632800.

The previous prime is 1971123131. The next prime is 1971123179. The reversal of 1971123150 is 513211791.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6570261 + ... + 6570560.

It is an arithmetic number, because the mean of its divisors is an integer number (203682741).

Almost surely, 2^1971123150 is an apocalyptic number.

1971123150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1971123150 is an abundant number, since it is smaller than the sum of its proper divisors (2917262634).

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

1971123150 is a wasteful number, since it uses less digits than its factorization.

1971123150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13140836 (or 13140831 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 30.

The square root of 1971123150 is about 44397.3326901516. The cubic root of 1971123150 is about 1253.8278712890.

The spelling of 1971123150 in words is "one billion, nine hundred seventy-one million, one hundred twenty-three thousand, one hundred fifty".