155772534 has 16 divisors (see below), whose sum is σ = 314303472. Its totient is φ = 51464448.

The previous prime is 155772511. The next prime is 155772541. The reversal of 155772534 is 435277551.

It is a happy number.

155772534 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 155772492 and 155772501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114199 + ... + 115554.

It is an arithmetic number, because the mean of its divisors is an integer number (19643967).

Almost surely, 2^155772534 is an apocalyptic number.

155772534 is an abundant number, since it is smaller than the sum of its proper divisors (158530938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155772534 is a wasteful number, since it uses less digits than its factorization.

155772534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229871.

The product of its digits is 147000, while the sum is 39.

The square root of 155772534 is about 12480.8867473429. The cubic root of 155772534 is about 538.0594890985.

The spelling of 155772534 in words is "one hundred fifty-five million, seven hundred seventy-two thousand, five hundred thirty-four".