155723153 has 4 divisors (see below), whose sum is σ = 157101348. Its totient is φ = 154344960.

The previous prime is 155723149. The next prime is 155723171. The reversal of 155723153 is 351327551.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14992384 + 140730769 = 3872^2 + 11863^2 .

It is a cyclic number.

It is not a de Polignac number, because 155723153 - 2² = 155723149 is a prime.

It is a super-2 number, since 2×155723153² = 48499400760522818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155722153) 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, 688928 + ... + 689153.

It is an arithmetic number, because the mean of its divisors is an integer number (39275337).

Almost surely, 2^155723153 is an apocalyptic number.

It is an amenable number.

155723153 is a deficient number, since it is larger than the sum of its proper divisors (1378195).

155723153 is a wasteful number, since it uses less digits than its factorization.

155723153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378194.

The product of its digits is 15750, while the sum is 32.

The square root of 155723153 is about 12478.9083256509. The cubic root of 155723153 is about 538.0026268626.

The spelling of 155723153 in words is "one hundred fifty-five million, seven hundred twenty-three thousand, one hundred fifty-three".