155231351 has 4 divisors (see below), whose sum is σ = 169343304. Its totient is φ = 141119400.

The previous prime is 155231327. The next prime is 155231407. The reversal of 155231351 is 153132551.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155231351 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155231351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155231051) 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, 7055960 + ... + 7055981.

It is an arithmetic number, because the mean of its divisors is an integer number (42335826).

Almost surely, 2^155231351 is an apocalyptic number.

155231351 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

155231351 is a deficient number, since it is larger than the sum of its proper divisors (14111953).

155231351 is a wasteful number, since it uses less digits than its factorization.

155231351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14111952.

The product of its digits is 2250, while the sum is 26.

The square root of 155231351 is about 12459.1874133107. The cubic root of 155231351 is about 537.4356595782.

The spelling of 155231351 in words is "one hundred fifty-five million, two hundred thirty-one thousand, three hundred fifty-one".