161290351 has 8 divisors (see below), whose sum is σ = 165413808. Its totient is φ = 157176000.

The previous prime is 161290333. The next prime is 161290369. The reversal of 161290351 is 153092161.

It is an interprime number because it is at equal distance from previous prime (161290333) and next prime (161290369).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161290351 - 2⁵ = 161290319 is a prime.

It is a super-3 number, since 3×161290351³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161290301) 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, 46756 + ... + 50086.

It is an arithmetic number, because the mean of its divisors is an integer number (20676726).

Almost surely, 2^161290351 is an apocalyptic number.

161290351 is a deficient number, since it is larger than the sum of its proper divisors (4123457).

161290351 is a wasteful number, since it uses less digits than its factorization.

161290351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4553.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 161290351 is about 12700.0138188901. The cubic root of 161290351 is about 544.3390140598.

The spelling of 161290351 in words is "one hundred sixty-one million, two hundred ninety thousand, three hundred fifty-one".