2150747961 has 4 divisors (see below), whose sum is σ = 2867663952. Its totient is φ = 1433831972.

The previous prime is 2150747957. The next prime is 2150747971. The reversal of 2150747961 is 1697470512.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2150747961 - 2² = 2150747957 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2150747971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 358457991 + ... + 358457996.

It is an arithmetic number, because the mean of its divisors is an integer number (716915988).

Almost surely, 2^2150747961 is an apocalyptic number.

It is an amenable number.

2150747961 is a deficient number, since it is larger than the sum of its proper divisors (716915991).

2150747961 is an equidigital number, since it uses as much as digits as its factorization.

2150747961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716915990.

The product of its (nonzero) digits is 105840, while the sum is 42.

The square root of 2150747961 is about 46376.1572470165. The cubic root of 2150747961 is about 1290.8125323909.

The spelling of 2150747961 in words is "two billion, one hundred fifty million, seven hundred forty-seven thousand, nine hundred sixty-one".