1400201550 has 72 divisors (see below), whose sum is σ = 4103877960. Its totient is φ = 339441600.

The previous prime is 1400201533. The next prime is 1400201557. The reversal of 1400201550 is 551020041.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400201557) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 136485 + ... + 146384.

It is an arithmetic number, because the mean of its divisors is an integer number (56998305).

Almost surely, 2^1400201550 is an apocalyptic number.

1400201550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1400201550 is an abundant number, since it is smaller than the sum of its proper divisors (2703676410).

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

1400201550 is a wasteful number, since it uses less digits than its factorization.

1400201550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282898 (or 282890 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 1400201550 is about 37419.2670959761. The cubic root of 1400201550 is about 1118.7426232569.

Adding to 1400201550 its reverse (551020041), we get a palindrome (1951221591).

The spelling of 1400201550 in words is "one billion, four hundred million, two hundred one thousand, five hundred fifty".