1513255440 has 40 divisors (see below), whose sum is σ = 4691092608. Its totient is φ = 403534720.

The previous prime is 1513255397. The next prime is 1513255453. The reversal of 1513255440 is 445523151.

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

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1513255398 and 1513255407.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3152376 + ... + 3152855.

Almost surely, 2^1513255440 is an apocalyptic number.

1513255440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1513255440 is an abundant number, since it is smaller than the sum of its proper divisors (3177837168).

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

1513255440 is a wasteful number, since it uses less digits than its factorization.

1513255440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6305247 (or 6305241 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 1513255440 is about 38900.5840573120. The cubic root of 1513255440 is about 1148.0762898145.

Adding to 1513255440 its reverse (445523151), we get a palindrome (1958778591).

The spelling of 1513255440 in words is "one billion, five hundred thirteen million, two hundred fifty-five thousand, four hundred forty".