43355151961 has 27 divisors (see below), whose sum is σ = 49877474997. Its totient is φ = 37654323960.

The previous prime is 43355151941. The next prime is 43355151977. The reversal of 43355151961 is 16915155334.

The square root of 43355151961 is 208219.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 43355151961 - 2⁹ = 43355151449 is a prime.

It is a super-2 number, since 2×43355151961² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43355151911) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 52678996 + ... + 52679818.

Almost surely, 2^43355151961 is an apocalyptic number.

43355151961 is the 208219-th square number.

43355151961 is the 104110-th centered octagonal number.

It is an amenable number.

43355151961 is a deficient number, since it is larger than the sum of its proper divisors (6522323036).

43355151961 is an frugal number, since it uses more digits than its factorization.

43355151961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1714 (or 857 counting only the distinct ones).

The product of its digits is 243000, while the sum is 43.

The spelling of 43355151961 in words is "forty-three billion, three hundred fifty-five million, one hundred fifty-one thousand, nine hundred sixty-one".