151235440 has 40 divisors (see below), whose sum is σ = 370132560. Its totient is φ = 57309696.

The previous prime is 151235411. The next prime is 151235443. The reversal of 151235440 is 44532151.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151235443) 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, 48229 + ... + 51268.

It is an arithmetic number, because the mean of its divisors is an integer number (9253314).

Almost surely, 2^151235440 is an apocalyptic number.

151235440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

151235440 is an abundant number, since it is smaller than the sum of its proper divisors (218897120).

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

151235440 is a wasteful number, since it uses less digits than its factorization.

151235440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99529 (or 99523 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 151235440 is about 12297.7819138249. The cubic root of 151235440 is about 532.7840212302.

Adding to 151235440 its reverse (44532151), we get a palindrome (195767591).

The spelling of 151235440 in words is "one hundred fifty-one million, two hundred thirty-five thousand, four hundred forty".