155142623 has 2 divisors, whose sum is σ = 155142624. Its totient is φ = 155142622.

The previous prime is 155142599. The next prime is 155142641. The reversal of 155142623 is 326241551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155142623 - 2⁸ = 155142367 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155142223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77571311 + 77571312.

It is an arithmetic number, because the mean of its divisors is an integer number (77571312).

Almost surely, 2^155142623 is an apocalyptic number.

155142623 is a deficient number, since it is larger than the sum of its proper divisors (1).

155142623 is an equidigital number, since it uses as much as digits as its factorization.

155142623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 29.

The square root of 155142623 is about 12455.6261584876. The cubic root of 155142623 is about 537.3332432401. Note that the first 3 decimals are identical.

The spelling of 155142623 in words is "one hundred fifty-five million, one hundred forty-two thousand, six hundred twenty-three".