155872061 has 4 divisors (see below), whose sum is σ = 160900224. Its totient is φ = 150843900.

The previous prime is 155872049. The next prime is 155872109. The reversal of 155872061 is 160278551.

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, and also an emirpimes, since its reverse is a distinct semiprime: 160278551 = 1051 ⋅152501.

It is a cyclic number.

It is not a de Polignac number, because 155872061 - 2²⁶ = 88763197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155872021) 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, 2514035 + ... + 2514096.

It is an arithmetic number, because the mean of its divisors is an integer number (40225056).

Almost surely, 2^155872061 is an apocalyptic number.

It is an amenable number.

155872061 is a deficient number, since it is larger than the sum of its proper divisors (5028163).

155872061 is an equidigital number, since it uses as much as digits as its factorization.

155872061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5028162.

The product of its (nonzero) digits is 16800, while the sum is 35.

The square root of 155872061 is about 12484.8732873025. The cubic root of 155872061 is about 538.1740579602.

The spelling of 155872061 in words is "one hundred fifty-five million, eight hundred seventy-two thousand, sixty-one".