155019740 has 12 divisors (see below), whose sum is σ = 325541496. Its totient is φ = 62007888.

The previous prime is 155019737. The next prime is 155019743. The reversal of 155019740 is 47910551.

155019740 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (155019737) and next prime (155019743).

It is a super-2 number, since 2×155019740² = 48062239579335200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 155019697 and 155019706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155019743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3875474 + ... + 3875513.

It is an arithmetic number, because the mean of its divisors is an integer number (27128458).

Almost surely, 2^155019740 is an apocalyptic number.

155019740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155019740 is an abundant number, since it is smaller than the sum of its proper divisors (170521756).

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

155019740 is a wasteful number, since it uses less digits than its factorization.

155019740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7750996 (or 7750994 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 32.

The square root of 155019740 is about 12450.6923502270. The cubic root of 155019740 is about 537.1913381972.

The spelling of 155019740 in words is "one hundred fifty-five million, nineteen thousand, seven hundred forty".