161315401533 has 32 divisors (see below), whose sum is σ = 256151414400. Its totient is φ = 89010109440.

The previous prime is 161315401531. The next prime is 161315401543. The reversal of 161315401533 is 335104513161.

It is a happy number.

It is not a de Polignac number, because 161315401533 - 2¹ = 161315401531 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 161315401494 and 161315401503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161315401531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2544208 + ... + 2606841.

It is an arithmetic number, because the mean of its divisors is an integer number (8004731700).

Almost surely, 2^161315401533 is an apocalyptic number.

161315401533 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

161315401533 is a deficient number, since it is larger than the sum of its proper divisors (94836012867).

161315401533 is a wasteful number, since it uses less digits than its factorization.

161315401533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5151149.

The product of its (nonzero) digits is 16200, while the sum is 33.

Adding to 161315401533 its reverse (335104513161), we get a palindrome (496419914694).

The spelling of 161315401533 in words is "one hundred sixty-one billion, three hundred fifteen million, four hundred one thousand, five hundred thirty-three".