161420156103231 has 12 divisors (see below), whose sum is σ = 233278046366352. Its totient is φ = 107560084173696.

The previous prime is 161420156103221. The next prime is 161420156103251. The reversal of 161420156103231 is 132301651024161.

161420156103231 is a `hidden beast` number, since 1 + 6 + 1 + 4 + 2 + 0 + 1 + 5 + 610 + 3 + 2 + 31 = 666.

It is not a de Polignac number, because 161420156103231 - 2¹³ = 161420156095039 is a prime.

It is a super-2 number, since 2×161420156103231² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161420156103221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4446083211 + ... + 4446119516.

It is an arithmetic number, because the mean of its divisors is an integer number (19439837197196).

Almost surely, 2^{161420156103231} is an apocalyptic number.

161420156103231 is a deficient number, since it is larger than the sum of its proper divisors (71857890263121).

161420156103231 is a wasteful number, since it uses less digits than its factorization.

161420156103231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8892204750 (or 8892204747 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 161420156103231 in words is "one hundred sixty-one trillion, four hundred twenty billion, one hundred fifty-six million, one hundred three thousand, two hundred thirty-one".