161215534 has 8 divisors (see below), whose sum is σ = 245432808. Its totient is φ = 79404600.

The previous prime is 161215529. The next prime is 161215577. The reversal of 161215534 is 435512161.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 601417 + ... + 601684.

It is an arithmetic number, because the mean of its divisors is an integer number (30679101).

Almost surely, 2^161215534 is an apocalyptic number.

161215534 is a deficient number, since it is larger than the sum of its proper divisors (84217274).

161215534 is a wasteful number, since it uses less digits than its factorization.

161215534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1203170.

The product of its digits is 3600, while the sum is 28.

The square root of 161215534 is about 12697.0679292504. The cubic root of 161215534 is about 544.2548343791.

Adding to 161215534 its reverse (435512161), we get a palindrome (596727695).

The spelling of 161215534 in words is "one hundred sixty-one million, two hundred fifteen thousand, five hundred thirty-four".