161051437 has 4 divisors (see below), whose sum is σ = 161379936. Its totient is φ = 160722940.

The previous prime is 161051431. The next prime is 161051461. The reversal of 161051437 is 734150161.

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 a de Polignac number, because none of the positive numbers 2^k-161051437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161051431) 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, 163513 + ... + 164494.

It is an arithmetic number, because the mean of its divisors is an integer number (40344984).

Almost surely, 2^161051437 is an apocalyptic number.

It is an amenable number.

161051437 is a deficient number, since it is larger than the sum of its proper divisors (328499).

161051437 is an equidigital number, since it uses as much as digits as its factorization.

161051437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328498.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 161051437 is about 12690.6042803328. The cubic root of 161051437 is about 544.0701108545.

The spelling of 161051437 in words is "one hundred sixty-one million, fifty-one thousand, four hundred thirty-seven".