155274772 has 24 divisors (see below), whose sum is σ = 274985984. Its totient is φ = 76712832.

The previous prime is 155274761. The next prime is 155274773. The reversal of 155274772 is 277472551.

It is a super-2 number, since 2×155274772² = 48220509639303968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155274773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170743 + ... + 171649.

Almost surely, 2^155274772 is an apocalyptic number.

It is an amenable number.

155274772 is a deficient number, since it is larger than the sum of its proper divisors (119711212).

155274772 is a wasteful number, since it uses less digits than its factorization.

155274772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375 (or 1373 counting only the distinct ones).

The product of its digits is 137200, while the sum is 40.

The square root of 155274772 is about 12460.9298208440. The cubic root of 155274772 is about 537.4857650458.

The spelling of 155274772 in words is "one hundred fifty-five million, two hundred seventy-four thousand, seven hundred seventy-two".