156051993 has 8 divisors (see below), whose sum is σ = 220308768. Its totient is φ = 97914944.

The previous prime is 156051967. The next prime is 156052009. The reversal of 156051993 is 399150651.

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

It is a cyclic number.

It is not a de Polignac number, because 156051993 - 2¹⁴ = 156035609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (156051913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1529871 + ... + 1529972.

It is an arithmetic number, because the mean of its divisors is an integer number (27538596).

Almost surely, 2^156051993 is an apocalyptic number.

It is an amenable number.

156051993 is a deficient number, since it is larger than the sum of its proper divisors (64256775).

156051993 is a wasteful number, since it uses less digits than its factorization.

156051993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3059863.

The product of its (nonzero) digits is 36450, while the sum is 39.

The square root of 156051993 is about 12492.0772091754. The cubic root of 156051993 is about 538.3810599875.

The spelling of 156051993 in words is "one hundred fifty-six million, fifty-one thousand, nine hundred ninety-three".