155367971 has 4 divisors (see below), whose sum is σ = 169492344. Its totient is φ = 141243600.

The previous prime is 155367943. The next prime is 155367973. The reversal of 155367971 is 179763551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 155367971 - 2¹⁴ = 155351587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155367973) 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, 7062170 + ... + 7062191.

It is an arithmetic number, because the mean of its divisors is an integer number (42373086).

Almost surely, 2^155367971 is an apocalyptic number.

155367971 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

155367971 is a deficient number, since it is larger than the sum of its proper divisors (14124373).

155367971 is a wasteful number, since it uses less digits than its factorization.

155367971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14124372.

The product of its digits is 198450, while the sum is 44.

The square root of 155367971 is about 12464.6689085591. The cubic root of 155367971 is about 537.5932800791.

The spelling of 155367971 in words is "one hundred fifty-five million, three hundred sixty-seven thousand, nine hundred seventy-one".