154991950 has 48 divisors (see below), whose sum is σ = 300762000. Its totient is φ = 59351040.

The previous prime is 154991923. The next prime is 154991951. The reversal of 154991950 is 59199451.

It is a junction number, because it is equal to n+sod(n) for n = 154991897 and 154991906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154991951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 201166 + ... + 201934.

It is an arithmetic number, because the mean of its divisors is an integer number (6265875).

Almost surely, 2^154991950 is an apocalyptic number.

154991950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

154991950 is a deficient number, since it is larger than the sum of its proper divisors (145770050).

154991950 is a wasteful number, since it uses less digits than its factorization.

154991950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949 (or 944 counting only the distinct ones).

The product of its (nonzero) digits is 72900, while the sum is 43.

The square root of 154991950 is about 12449.5762980111. The cubic root of 154991950 is about 537.1592359642.

The spelling of 154991950 in words is "one hundred fifty-four million, nine hundred ninety-one thousand, nine hundred fifty".