155023534 has 4 divisors (see below), whose sum is σ = 232535304. Its totient is φ = 77511766.

The previous prime is 155023483. The next prime is 155023537. The reversal of 155023534 is 435320551.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155023537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38755882 + ... + 38755885.

It is an arithmetic number, because the mean of its divisors is an integer number (58133826).

Almost surely, 2^155023534 is an apocalyptic number.

155023534 is a deficient number, since it is larger than the sum of its proper divisors (77511770).

155023534 is an equidigital number, since it uses as much as digits as its factorization.

155023534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77511769.

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 155023534 is about 12450.8447102998. The cubic root of 155023534 is about 537.1957206226.

The spelling of 155023534 in words is "one hundred fifty-five million, twenty-three thousand, five hundred thirty-four".