155200772 has 6 divisors (see below), whose sum is σ = 271601358. Its totient is φ = 77600384.

The previous prime is 155200753. The next prime is 155200777. The reversal of 155200772 is 277002551.

It can be written as a sum of positive squares in only one way, i.e., 82337476 + 72863296 = 9074^2 + 8536^2 .

It is not an unprimeable number, because it can be changed into a prime (155200777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19400093 + ... + 19400100.

It is an arithmetic number, because the mean of its divisors is an integer number (45266893).

Almost surely, 2^155200772 is an apocalyptic number.

It is an amenable number.

155200772 is a deficient number, since it is larger than the sum of its proper divisors (116400586).

155200772 is a wasteful number, since it uses less digits than its factorization.

155200772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38800197 (or 38800195 counting only the distinct ones).

The product of its (nonzero) digits is 4900, while the sum is 29.

The square root of 155200772 is about 12457.9601861621. The cubic root of 155200772 is about 537.4003674713.

The spelling of 155200772 in words is "one hundred fifty-five million, two hundred thousand, seven hundred seventy-two".