161923010 has 16 divisors (see below), whose sum is σ = 291927672. Its totient is φ = 64665600.

The previous prime is 161923007. The next prime is 161923019. The reversal of 161923010 is 10329161.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 132687361 + 29235649 = 11519^2 + 5407^2 .

It is a super-2 number, since 2×161923010² = 52438122334920200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (161923019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6221 + ... + 19040.

Almost surely, 2^161923010 is an apocalyptic number.

161923010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161923010 is a deficient number, since it is larger than the sum of its proper divisors (130004662).

161923010 is a wasteful number, since it uses less digits than its factorization.

161923010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25909.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 161923010 is about 12724.8972490940. The cubic root of 161923010 is about 545.0498060702.

The spelling of 161923010 in words is "one hundred sixty-one million, nine hundred twenty-three thousand, ten".